610.1/GMAO GEOS-5 Data Production Overview Gi-Kong Kim GESDIS Staff - August, 20101

610.1/GMAO GEOS-5 Data Production Overview

Gi-Kong Kim

GESDIS Staff - August, 2010 1

Office HeadMichele Rienecker

ESMF

Production

I&T; Ops SW; Production; Sys admin

SSD

I & Forecasts; ODAS; LDAS; Var & Pred

IT Liason

Modeling

AGCM; LSM; OGCM; CGCM; Integration

Constituents

Ozone; Aerosols; Ocean Bio; CCC

Assimilation

Satellite Data; Analysis; Monitoring & Valid;

OSSEs

• GMAO has been established as a core resource in the development and use of satellite observations through the integrating tools of models and assimilation systems. Global ocean, atmosphere and land surface models are developed as components of assimilation and forecast systems as well as for addressing the weather and climate research questions .

• The GEOS-5 data assimilation system (DAS) is based on the GEOS-5 Atmospheric General Circulation Model (AGCM) integrated with the Gridpoint Statistical Interpolation (GSI) Analysis.

Introduction to 610.1/GMAO & GEOS-5


• Focus of the presentation:

Introduce GESDIS staff to the GEOS-5 production at a high level and the collaboration between GES DISC and GMAO for the end-to-end GEOS-5 production operations

GMAO Products Page: http://gmao.gsfc.nasa.gov/products/

GEOS-5 Data Assimilation


• • •

• • •

• GEOS-5 integrates the observations and models to produce the best representation of the atmospheric state

• GEOS-5 covers the entire globe with physically consistent data

GEOS-5 Data Assimilation Schematic


Production Streams


• Near Real Time (NRT): Assimilation products (DAS), Forecasts (http://gmao.gsfc.nasa.gov/forecasts/)

• Reprocessing for Instrument Teams

• Long-term re-analysis: MERRA

• Customized products:

- CERES team: uses controlled set of input obs to minimize data shock when a new data type is introduced in the mid-stream - YOTC

Type Description # of Var (175 total)

Freq

inst2d_met_x 2D meteorological state, instantaneous at the surface, on a single-level, or vertically integrated

27 8/day

inst3d_met_p 3D meteorological state, instantaneous on pressure coordinates 8 4/day

tavg2d_met_x 2D meteorological state, time-averaged at the surface, on a single-level, or vertically integrated

79 8/day

tavg3d_prs_v 3D pressure information, time-averaged on lcv coordinates 3 4/day

tavg3d_dyn_v 3D dynamics fields, time-averaged on lcv coordinates 14 4/day

tavg3d_cld_v 3D cloud & precipitation fields, time-averaged on lcv coordinates

10 4/day

tavg3d_met_e 3D meteorological fields, time-averaged on lcv coordinate layer edges

6 4/day

tavg3d_mst_v 3D moisture tendency fields, time-averaged on lcv coordinates 7 4/day

tavg3d_tmp_v 3D temperature tendency fields, time-averaged on lcv coordinates

11 4/day

tavg3d_wnd_v 3D wind tendency fields, time-averaged on lcv coordinates 10 4/day

GEOS-5.2.0 NRT Assimilation Products


• V5.2.0 data are in HDF-4 at ½ deg spatial resolution. The next version, v5.6.2, will be in HDF-5 at ¼ deg .

GEOS-5 Data Users


• EOS Instrument Teams: CERES, MLS, TES, CALIPSO, MODIS/Land

• Science Support: GMI-CTM, GEOS-CHEM (Harvard), U of MD, …

• Other Projects: GEWEX/CEOP, POWER, FLASHFlux, SRB, YOTC, GLDAS, Flood Warning, SPARC-IPY, JAXA/SMILES, …

• Field Experiments: Recently ARCTAS, TIGERZ-II, HIPPO, GloPac, GRIP (Aug, 2010)

• General Users of MERRA products at GES DISC/MDISC

Input Observations for NRT Production

GESDIS Staff - August, 20109

• Most of the input data for NRT are obtained via GES DISC. Some of the input data for non –real time use are obtained directly from other sources such RSS, ECMWF, NCAR, …

• All the input data are in BUFR format

• Currently working with NRT AIRS data team at GES DISC to acquire AIRS radiance data from LANCE.

Data Type Source Active/Passive Time Period Used

TEMPERATURERadiosonde, Aircraft, DropsondeSea Surface, Surface Marine

NCEP GDASNCEP GDAS

ActiveActive

8/14/2008 - Present8/14/2008 - Present

PRESSUREMETAR, Land Station, Marine SurfaceRadiosonde Station NCEP GDAS Active 8/14/2008 - Present

RADIANCESAQUA AIRS & AMSUAAMSUA, AMSUB, HIRS3

NOAA SERVERNCEP GDAS

ActiveActive

8/14/2008 - Present8/14/2008 - Present

WINDSRadiosonde, PIBAL, Wind Profiler, NEXRAD, Aircraft, Dropsonde, Surface MarineAtlas Buoy, Water Vapor, IR/VIS Cloud Drift

NCEP GDASNCEP GDASNCEP GDAS

ActiveActiveActive

8/14/2008 - Present8/14/2008 - Present8/14/2008 - Present

MOISTURERadiosonde, Surface MarineTMI Rain RateDropsonde

NCEP GDASNCEP GDASNCEP GDAS

ActiveActivePassive

8/14/2008 - Present8/14/2008 - Present8/14/2008 - Present

OZONESBUV NCEP GDAS Active 8/14/2008 - Present

Data Processing


• Processing done using HEC resources at NCCS

- Uses queues of sizes ranging from 144-cpu (1/2 deg) to 720-cpu (1/4 deg) on the NCCS ‘discover’ system - GCM performance scales well as the number of CPUs is increased, but less so with GSI - Throughput: 6dd/d – 10dd/d, 30dd/d desired (MERRA: 10dd/d) (On the average, GEOS-5 system is upgraded once a year) - High throughtput vs high spatial resolution

* NRT production timeline

Z 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 0 L 7pm 1am 7am 1pm 7pm

Data 18z 0z 6z 12z

0Z 5-day Fcst

6Z DAS

Post Proc

18Z DAS

Post Proc

0Z DAS

Post Proc

12Z DAS

Post Proc

12Z 5-day Fcst

AIRS

GDAS

AIRS

GDAS

AIRS

GDAS

AIRS

GDAS

Quality Assurance


• Online QA

- Input observations are screened before the analysis

- Output QC by QuADS (range check, hydrostatic check, ..)

• Offline product quality assessment

- Monitoring meeting held weekly

- Various analysis and monitoring tools are developed and used

E.g., OBS2HTML diagrams, forecast skill scores, O-F and O-A stats, comparison with data from other centers (NCEP, ECMWF,..)

Data Distribution


• NRT data and MERRA via GES DISC

- NRT data distributed to subscribed users after predefined subsetting.

- MERRA: On web-based online data system with various tools for data search and order (Mirador), subsetting, data transport (ftp, openDAP, GDS), visualization (Giovanni). MERRA user metrics (http://gmao.gsfc.nasa.gov/products/) show that data are being accessed by users from over the globe at a steady rate.

- mdisc: http://disc.sci.gsfc.nasa.gov/mdisc/

• NCCS data portal for mission support and science collaborators - Forecasts as well as assimilation products are made available for mission support

- Data retained online for 6 months

- GRIP mission support page: http://gmao.gsfc.nasa.gov/projects/grip/

Source for more information


• GMAO research page: http://gmao.gsfc.nasa.gov/ • Technical report: ‘The GEOS-5 Data Assimilation System – Documentation of Version 5.0.1, 5.1.0, and 5.2.0’

Documents

610.1/GMAO GEOS-5 Data Production Overview Gi-Kong Kim GESDIS Staff - August, 20101