Upload
marlie
View
45
Download
1
Tags:
Embed Size (px)
DESCRIPTION
GEOS-CHEM at the University of Washington. Lyatt Jaeglé, Qing Liang, Linda Steinberger, Sarah Strode, Ricky Sinha Long-range transport of CO and O 3 to the NE Pacific Biomass burning in Africa: GOME and SAFARI 2000 Global modeling of the mercury cycle - PowerPoint PPT Presentation
Citation preview
U N I V E R S I T Y O F W A S H I N G T O N S C H O O L O F N U R S I N GU N I V E R S I T Y O F W A S H I N G T O N DEPARTMENT OF ATMOSPHERIC SCIENCES
GEOS-CHEM at the University of Washington
Lyatt Jaeglé, Qing Liang, Linda Steinberger, Sarah Strode, Ricky Sinha
Long-range transport of CO and O3 to the NE Pacific Biomass burning in Africa: GOME and SAFARI 2000
Global modeling of the mercury cycle
Interactive display of GEOS-CHEM results on the web
Long-range transport of CO and O3 to the NE PacificQing LiangCollaborators: Dan Jaffe and his group at UW BothellModel evaluation with PHOBEA observations in NE Pacific:
Spring 1997, 1998, 2001, 2002: CO, O3 [NMHC, NOx, PAN, Rn] Full seasonal cycle Mar 2001-June 2002: CO, O3
Applications: Origin of CO and O3 in NE Pacific: long-range transport from Asia Seasonal and interannual variability in long-range transport
GEOS-CHEM forecasts: ITCT2K2 and PHOBEA-II during spring 2002
Duchess aircraft
Cheeka Peak Observatory
Origin of CO and O3 at Cheeka Peak: Spring 2002
COCO OO33
Very good agreement: Model captures background levels and day-to-day variability in CO
Model underestimates O3 levels by 7 ppbv and poor correlation
Obs: 149 ppbv; Model: 153 ppbv; r2= 0.68 Obs: 43 ppbv; Model: 36 ppbv; r2= 0.27
Asia
Europe
Stratosphere Asia
North America
Model
Observations
Vertical profiles above CPO during spring 2001
12 Duchess aircraft flights
Model Observations
CO profiles O3 profiles
Very good agreement for CO
BUT for ozone negative bias near surface and positive bias aloft: Strat-trop exchange? N2O5 hydrolysis (Temp. dependent)? NOx emissions?
Seasonal variations of CO in 2001 at CPO
spring 2002winterfallsummerspring 2001
Asia
North America
spring 2002
Biomass burning in Africa: SAFARI 2000
Model evaluation with SAFARI 2000 observations Aug-Sep 2000: UW Convair 580: CO, O3, SO2, NMHCs Ozonesondes [Thompson et al., 2000] Improve biomass burning, fossil fuel, and biogenic emission inventories
Applications: Origin of haze over Africa Export of biomass burning and anthropogenic emissions through the
river of smoke (Indian Ocean) vs. to the Atlantic
Ricky Sinha, Peter Hobbs
UW CONVAIR 580
Timbavati fire
P. Hobbs
O3 GEOS-CHEM
LongitudeObs: 60 ppbv; Model: 44 ppbv; r = 0.72
O3 UW Convair 580
Biomass burning over Botswana and Zambia
Longitude Clean marine air over Namibia + Mozambique coasts
UW Convair 580 flight tracks and O3
Longitude
SHADOZ ozonesondes during SAFARI2k
Lusaka, Zambia
Model
ObservationsIrene, South Africa
SAFARI 2K ozonesondes: Thompson et al. [2002]
Model
Observations
SAFARI’s river of smoke
GEOS-CHEM CO
September 5 2000
TOMS Aerosol Index
Eck et al., 2003
Using satellite observations to constrain biomass burning emissions in Africa: GOMELinda SteinbergerCollaborators: Randall Martin, Kelly Chance, Paul Palmer
GEOS-CHEM
GOMENO2, HCHO columns
Other satellites:Fires/burned areas (SPOT, ATSR)Aerosol optical depth (MODIS)MOPITT CO
Plume studies
Aug-Sep 2000
NO2 columns in Aug. 2000: GOME & GEOS-CHEM
GOME NO2 GEOS-CHEM NO2
Burned Area (SPOT-VGT)
Global Burned Area 2000 Project [Silva et al., 2003]
ATSR Fire countsSpatial distribution of fires[Duncan et al., 2002]
1015 cm-2
0.40 Tg N 0.41 Tg N
NO2 & HCHO columns in August 2000GOME NO2 GEOS-CHEM NO2
GOME HCHO GEOS-CHEM HCHO
1015 cm-2
1016 cm-2
Isoprene emissions in GEOS-CHEM too large? Biomass burning VOC in GEOS-CHEM too small?
West to East progression in biomass burning during the dry season
GOME NO2 Burned area GOME HCHOJul ‘00
Aug ‘00
Sep ‘00
1015 cm-21016 cm-2
NOx emissions over Africa: July-February
Northern Africa (0-30ºN)Southern Africa (0-20ºS)
Jul Aug Sep Oct Nov Dec Jan Feb Jul Aug Sep Oct Nov Dec Jan Feb
GOME GEOS-CHEM
GEOS-CHEM Mercury simulationSarah Strode, Igor Kamenkovich (JISAO)Collaborators: Noelle Eckley, Rokjin Park, Daniel Jacob
Model development: Ocean mercury module Biomass burning emissions
Model evaluation: Surface observations networks
(Canada, US, Europe) Remote sites (Cheeka Peak
Observatory) + cruises + vertical profiles
Applications: Role ocean in the mercury cycle Long-range transport of mercury from
Asia Evolution of mercury since pre-
industrial times
Development of a GEOS-CHEM ocean mercury module
Implement air-sea exchange of mercury using temperature and wind-dependent transfer velocities
Couple GEOS-CHEM with a mixed-layer ocean model: wind-driven advection of Hg0/Hg2+
Implement oxidation of Hg2+ to Hg0 in surface waters (photoch./biol.) Investigate rapid oxidation of Hg0 in marine boundary layer For longer timescale simulations, use a 3-D ocean GCM (MOM 2)
HgoHg2+
Hgp
Particleremoval
Hg2+ Hgo
Net evasion
Marine boundary layer
Upper ocean
Free troposphereWet & dry deposition
?
?
http://jchemed.chem.wisc.edu/
An interactive web interface to display GEOS-CHEM results: http://www.atmos.washington.edu/~jaegle/geoso3_start.html
Web interface using ION (IDL On the Net) to access GAMAP and plot GEOS-CHEM fields
Interactive creation of maps, zonal means, and animations Monthly mean fields from Ox-NOx-NMHC simulations:
4°x5° (1994-1997) and 2°x2.5° (1997)
ITCT2K2 Automatic Processing System (IAPS) interactive web interface
GEOS-CHEM 5-day CO forecasts transferred from Harvard to UW Interactive creation of maps, vertical profiles, timeseries, and animations from the forecast output Successful use in the field for flight planning