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ASR Preliminary Meeting Boulder, Colorado Polar Meteorology Group, Byrd Polar Research Center, The Ohio State University, Columbus, Ohio David H. Bromwich, Lesheng Bai and Keith M. Hines Polar Meteorology Group, Byrd Polar Research Center The Ohio State University Plus Many Collaborators PROTOTYPE OF THE ARCTIC SYSTEM REANALYSIS Supported by NSF, NOAA, and DOE

ASR Preliminary Meeting Boulder, Colorado Polar Meteorology Group, Byrd Polar Research Center, The Ohio State University, Columbus, Ohio David H. Bromwich,

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ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

David H Bromwich Lesheng Bai and Keith M Hines Polar Meteorology Group Byrd Polar Research

CenterThe Ohio State UniversityPlus Many Collaborators

PROTOTYPE OFTHE ARCTIC SYSTEM

REANALYSIS

PROTOTYPE OFTHE ARCTIC SYSTEM

REANALYSIS

Supported by NSF NOAA and DOE

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Outlinebull The Arctic System Reanalysis (ASR)

bull Polar WRF

bull Atmospheric Data Assimilation

bull Noah Land Surface Data Assimilation

bull Validation

bull ASR Results

bull The Arctic System Reanalysis (ASR)

bull Polar WRF

bull Atmospheric Data Assimilation

bull Noah Land Surface Data Assimilation

bull Validation

bull ASR Results

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Arctic System Reanalysis Motivation

1 Rapid climate change is happening in the Arctic A comprehensive picture of the climate interactions is needed

2 Global reanalyses encounter many problems at high latitudes The ASR is using the best available depiction of Arctic processes at much higher spatial resolution

3 A system-oriented approach provides community focus with the atmosphere land surface and sea ice communities

4 The ASR provides a convenient synthesis of Arctic field programs (SHEBA LAIIATLAS ARM )

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR OutlineA physically-consistent integration of Arctic and other Northern Hemisphere data

Participants

Ohio State University - Byrd Polar Research Center (BPRC)

- and Ohio Supercomputer Center (OSC)National Center Atmospheric Research (NCAR)University of Colorado-Boulder University of Illinois at Urbana-Champaign

High resolution in space (10 km) and time (3 hours) Begin with years 2000-2010 (Earth Observing System)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 321)

Polar WRF(Version 321)

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR WRF-3DVar WRF Modeling System

BackgroundError

(gen_be)

Nested WRF3h Forecast

xb

xaUpdate Lateralamp Lower BCs(UPDATE_BC)

BackgroundPreprocessing(WPS real)

xlbc

Cycled Background

B0

yo R

xf

WRF-3DVar

Global FieldsERA-Interim

Seasonal dependent

PREPBUFRRadiance BUFROther spec data

3h frequency

HRLDAS output

Verification ampVisualization

WRF-3DVar Analysis performed over one domain in a 3-h interval

Atmospheric Data Assimilation

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Outlinebull The Arctic System Reanalysis (ASR)

bull Polar WRF

bull Atmospheric Data Assimilation

bull Noah Land Surface Data Assimilation

bull Validation

bull ASR Results

bull The Arctic System Reanalysis (ASR)

bull Polar WRF

bull Atmospheric Data Assimilation

bull Noah Land Surface Data Assimilation

bull Validation

bull ASR Results

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Arctic System Reanalysis Motivation

1 Rapid climate change is happening in the Arctic A comprehensive picture of the climate interactions is needed

2 Global reanalyses encounter many problems at high latitudes The ASR is using the best available depiction of Arctic processes at much higher spatial resolution

3 A system-oriented approach provides community focus with the atmosphere land surface and sea ice communities

4 The ASR provides a convenient synthesis of Arctic field programs (SHEBA LAIIATLAS ARM )

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR OutlineA physically-consistent integration of Arctic and other Northern Hemisphere data

Participants

Ohio State University - Byrd Polar Research Center (BPRC)

- and Ohio Supercomputer Center (OSC)National Center Atmospheric Research (NCAR)University of Colorado-Boulder University of Illinois at Urbana-Champaign

High resolution in space (10 km) and time (3 hours) Begin with years 2000-2010 (Earth Observing System)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 321)

Polar WRF(Version 321)

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR WRF-3DVar WRF Modeling System

BackgroundError

(gen_be)

Nested WRF3h Forecast

xb

xaUpdate Lateralamp Lower BCs(UPDATE_BC)

BackgroundPreprocessing(WPS real)

xlbc

Cycled Background

B0

yo R

xf

WRF-3DVar

Global FieldsERA-Interim

Seasonal dependent

PREPBUFRRadiance BUFROther spec data

3h frequency

HRLDAS output

Verification ampVisualization

WRF-3DVar Analysis performed over one domain in a 3-h interval

Atmospheric Data Assimilation

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Arctic System Reanalysis Motivation

1 Rapid climate change is happening in the Arctic A comprehensive picture of the climate interactions is needed

2 Global reanalyses encounter many problems at high latitudes The ASR is using the best available depiction of Arctic processes at much higher spatial resolution

3 A system-oriented approach provides community focus with the atmosphere land surface and sea ice communities

4 The ASR provides a convenient synthesis of Arctic field programs (SHEBA LAIIATLAS ARM )

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR OutlineA physically-consistent integration of Arctic and other Northern Hemisphere data

Participants

Ohio State University - Byrd Polar Research Center (BPRC)

- and Ohio Supercomputer Center (OSC)National Center Atmospheric Research (NCAR)University of Colorado-Boulder University of Illinois at Urbana-Champaign

High resolution in space (10 km) and time (3 hours) Begin with years 2000-2010 (Earth Observing System)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 321)

Polar WRF(Version 321)

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR WRF-3DVar WRF Modeling System

BackgroundError

(gen_be)

Nested WRF3h Forecast

xb

xaUpdate Lateralamp Lower BCs(UPDATE_BC)

BackgroundPreprocessing(WPS real)

xlbc

Cycled Background

B0

yo R

xf

WRF-3DVar

Global FieldsERA-Interim

Seasonal dependent

PREPBUFRRadiance BUFROther spec data

3h frequency

HRLDAS output

Verification ampVisualization

WRF-3DVar Analysis performed over one domain in a 3-h interval

Atmospheric Data Assimilation

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR OutlineA physically-consistent integration of Arctic and other Northern Hemisphere data

Participants

Ohio State University - Byrd Polar Research Center (BPRC)

- and Ohio Supercomputer Center (OSC)National Center Atmospheric Research (NCAR)University of Colorado-Boulder University of Illinois at Urbana-Champaign

High resolution in space (10 km) and time (3 hours) Begin with years 2000-2010 (Earth Observing System)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 321)

Polar WRF(Version 321)

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR WRF-3DVar WRF Modeling System

BackgroundError

(gen_be)

Nested WRF3h Forecast

xb

xaUpdate Lateralamp Lower BCs(UPDATE_BC)

BackgroundPreprocessing(WPS real)

xlbc

Cycled Background

B0

yo R

xf

WRF-3DVar

Global FieldsERA-Interim

Seasonal dependent

PREPBUFRRadiance BUFROther spec data

3h frequency

HRLDAS output

Verification ampVisualization

WRF-3DVar Analysis performed over one domain in a 3-h interval

Atmospheric Data Assimilation

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 321)

Polar WRF(Version 321)

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

The key modifications for Polar WRF are Optimal turbulence (boundary layer) parameterization Implementation of fractional sea ice as well as variable thickness of sea ice and snow cover on sea ice in the Noah LSM Improved treatment of heat transfer for ice sheets and revised surface energy balance calculation in the Noah LSM Model evaluations through Polar WRF simulations over Greenland the Arctic Ocean (SHEBA site) and Alaska have been performed Polar WRF is used by forecasters as part of the National Science Foundation sponsored Antarctic Mesoscale Prediction System Polar WRF is used by ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR WRF-3DVar WRF Modeling System

BackgroundError

(gen_be)

Nested WRF3h Forecast

xb

xaUpdate Lateralamp Lower BCs(UPDATE_BC)

BackgroundPreprocessing(WPS real)

xlbc

Cycled Background

B0

yo R

xf

WRF-3DVar

Global FieldsERA-Interim

Seasonal dependent

PREPBUFRRadiance BUFROther spec data

3h frequency

HRLDAS output

Verification ampVisualization

WRF-3DVar Analysis performed over one domain in a 3-h interval

Atmospheric Data Assimilation

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR WRF-3DVar WRF Modeling System

BackgroundError

(gen_be)

Nested WRF3h Forecast

xb

xaUpdate Lateralamp Lower BCs(UPDATE_BC)

BackgroundPreprocessing(WPS real)

xlbc

Cycled Background

B0

yo R

xf

WRF-3DVar

Global FieldsERA-Interim

Seasonal dependent

PREPBUFRRadiance BUFROther spec data

3h frequency

HRLDAS output

Verification ampVisualization

WRF-3DVar Analysis performed over one domain in a 3-h interval

Atmospheric Data Assimilation

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Aqua (AMSU AIRS)

NOAA (HIRS AMSU)

Atmospheric Data Assimilation

Observational Data for ASR

Atmospheric Data Assimilation

Observational Data for ASR

PREPBUFR from Jack Woollen (including synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw gpspw)

Radiances also from JWdifferent sensors (amsua amsub mhs hirs3 hirs4) in separate BUFR files

GPSGPSRO GPSIPW

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

High-Resolution Land Data Assimilation

System (HRLDAS) for ASR1048708

Blending atmospheric and land-surface observations with the Noah land surface model Eg MODIS surface albedo snow cover and vegetation characteristics

To provide land state variables for driving the coupled Polar WRFNoah modeling system ndash Soil moisture (liquid and solid phase) ndash Soil temperature ndash Snow water equivalent and depth ndash Canopy water content ndash Vegetation characteristics

To provide long-term evolution of the above variables plus surface hydrological cycle (runoff evaporation) and energy cycle (surface heat flux ground heat flux upward long-wave radiation)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationValidation

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

bull Polar WRFbull Satellite Radiancebull Microphysics and Cloud Fractionbull Diurnal Pressure over Mountain Regions

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation ResultPolar WRF corrected 2m-temperature warm bias over

Greenland

Polar WRF

AVN

AVN

Data assimilation 2m-temperature (oC) using Polar WRF and WRF and ERA-Interim 2m-temperature (oC) in October 2007

AVN

ERA-Interm

AVN

ERA

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation T2m cold bias over sea ice (200712)Validation T2m cold bias over sea ice (200712)

Polar WRFPolar WRF

WRFWRF

AVNAVN

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioTest Cases Radiance T2m

Test Cases Radiance T2m

NCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Validation RadianceValidation RadianceNCEP PREBUFER

NCEP PREBUFER + RAD

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ValidationMicrophysics and Cloud Fraction

ValidationMicrophysics and Cloud Fraction

WSM 6-class scheme Morrison 2-moment scheme

Cloud fraction one month cycling run (200808)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioValidation Surface Pressure Diurnal Cycle (200808)Validation Surface Pressure Diurnal Cycle (200808)

ERA-Interim (6h)ERA-Interim (6h)

ASR (3h)ASR (3h)

AVN (6h)AVN (6h)

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Two Year Cycling RunsTwo Year Cycling Runs Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

Period 2007-2008 Reduced Resolution 30km71L 10mb top Observations in 3-hour time window

ndash PREPBUFR (global obs errors)ndash satellite radiance data (AMSU-A AMSU-B

MHIS) ERA-Interim reanalysis for LBCs WRF-3DVarPolar WRF version 311 Full 3-hourly cycling run on OSC Glenn cluster

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Polar WRF(Version 32)

Numerical and Physics optionsNon hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

Non hydrostatic dynamics5th order horizontal advection (upwind-based)3rd order vertical advectionPositive-definite advection for moisture6th-order horizontal hyper diffusionFull horizontal diffusionGrid nudging to ERA-Interim 200 hPa and aboveUpper dampingMorrison double-moment scheme New Grell sub-grid scale cumulus scheme RRTMG atmospheric radiation scheme RRTMG shortwave schemeMYNN planetary boundary layer scheme MYNN surface layerNoah land surface modelFractional sea ice

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

PREPBUFRIncluding synop metar ship buoy qscat sound airep profiler pilot satob ssmi_retrieval_sea_surface_wind_speed ssmi_retrieval_pw

Radiancesamsua amsub mhs

Fractional Sea Ice

Observational Data for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Domain for ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

ASR Data Assimilation Result

Precipitation

ERA

Yearly Total 2008 Unit cm

ERA

ERA-Interim

ASR

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

Near Surface Variables Statistics

The data used for the surface statistics

NCEP FNL (or AVN)

ERA-Interim

Surface stations

(More than 12000 obtained from the National Climatic Data Center (NCDC) and Greenland Climate Network (GC-NET))

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result Near Surface Variables

Statistics Average statistics from comparing ASR for 2007 with observations

MonthWind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 132 276 075 024 288 091 157 289 091 034 114 099 02 119 261 075 022 278 091 174 297 090 031 110 099 03 102 250 075 -018 295 091 137 280 088 029 110 099 04 079 221 075 -037 279 093 098 248 088 026 097 099 05 054 207 072 -054 303 090 043 230 087 024 102 098 06 050 189 072 -048 296 091 024 208 085 022 097 098 07 049 184 071 -059 288 090 022 204 083 023 096 098 08 055 186 072 -058 275 091 025 191 086 024 094 098 09 077 206 074 -057 262 092 040 201 089 029 096 099 10 088 220 074 -040 259 092 060 206 091 032 099 099 11 116 258 074 -011 271 091 110 250 090 032 105 099 12 116 260 075 018 278 090 154 286 090 028 107 099

Average 086 227 074 -026 281 091 087 241 088 028 102 099 Average statistics from comparing AVN for 2007 with observations

Month Wind Speed 2m-Temperature 2m-Dew point Surface pressure

bias rmse corr bias rmse corr bias rmse corr bias rmse corr

01 028 230 072 -041 329 089 135 301 090 016 118 099 02 017 215 072 -077 331 087 132 308 088 015 117 099 03 -003 212 070 -136 359 087 119 308 085 015 119 099 04 -021 200 069 -151 360 088 078 298 083 017 107 099 05 -014 203 065 -119 348 088 012 266 084 012 105 098 06 -013 188 064 -109 338 087 -087 270 079 011 102 098 07 -003 185 063 -093 329 087 -121 278 076 013 100 098 08 008 186 063 -085 326 086 -110 264 080 014 101 098 09 022 200 066 -077 315 088 -041 246 085 012 102 099 10 031 201 068 -060 308 088 037 238 088 007 106 099 11 040 222 070 -021 315 089 118 296 088 010 110 099 12 043 224 072 -010 323 087 186 352 088 -001 121 099

Average 011 206 068 -082 332 088 038 285 085 012 109 099

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

2m Temperature Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (AVN) assimilation and observations in August 2008

ASRcorrelation -AVNcorrelation

ASRrmse -AVNrmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus OhioASR Data Assimilation Result

10m Wind Speed Statistic Differences

between ASR (ERA) assimilation and observations in August 2008

ASRcorrelation -ERAcorrelation ASRrmse -ERArmse

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

ASR Preliminary Meeting Boulder Colorado

Polar Meteorology Group Byrd Polar Research Center The Ohio State University Columbus Ohio

SummarySummaryA reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010

A reduced-resolution prototype assimilation for the Arctic for 2007-2008 has been completed Major progress has been made The test results look very encouraging and have being distributed to selected users (16 months)

However still quite some testing to do to optimize ASR especially the physics and land surface data assimilation

To engage the community in early ASR evaluation and use a 10-km 3-h assimilation is planned to be run for 4 months and a 30-km (3h) assimilation will be completed for 10 years (2000-2009) by end of 2010