quantifying intercontinental transport through integration of observations and models
DESCRIPTION
QUANTIFYING INTERCONTINENTAL TRANSPORT THROUGH INTEGRATION OF OBSERVATIONS AND MODELS. SATELLITE OBSERVATIONS Global and continuous but few species, low resolution. Source/sink inventories. 3-D CHEMICAL TRACER MODELS. SURFACE OBSERVATIONS high resolution but spatially limited. - PowerPoint PPT PresentationTRANSCRIPT
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QUANTIFYING INTERCONTINENTAL TRANSPORTTHROUGH INTEGRATION OF OBSERVATIONS AND MODELS
3-D CHEMICAL TRACER MODELS
INTERCONTINENTAL TRANSPORT:INTERCONTINENTAL TRANSPORT:CONCENTRATIONS AND FLUXESCONCENTRATIONS AND FLUXES
SATELLITE OBSERVATIONSGlobal and continuous but few species, low resolution
AIRCRAFT OBSERVATIONSHigh resolution, targeted flights
provide critical snapshots for model testing
SURFACE OBSERVATIONShigh resolution but spatially limited
Source/sinkinventories
Assimilated meteorological
data
Chemical and aerosolprocesses
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TRACE-P EXECUTION
Emissions-Fossil fuel-Biomass burning-Biosphere, dust
Long-range transport fromEurope, N. America, Africa
ASIA PACIFIC
P-3
Satellite datain near-real time:MOPITTTOMSSEAWIFSAVHRRLIS
DC-8
3D chemical model forecasts: - ECHAM - GEOS-CHEM - Iowa/Kyushu - Meso-NH -LaRC/U. Wisconsin
FLIGHTPLANNING
Boundary layerchemical/aerosolprocessing
ASIANOUTFLOW
Stratosphericintrusions
PACIFIC
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TOMS AND SEAWIFS DATA DURING TRACE-P (3/21/01)Observations of dust, biomass burning plumes
DC-8Flight track
TOMSAerosol index
SEAWIFSAOD SEAWIFS
Visible image
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MOPITT near-real time CO column data during TRACE-P:diamonds show validation experiments
Source: J.C. Gille, NCAR
MOPITT validation spiralsMOPITT validation transect (following orbit track)
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MOPITT validationduring TRACE-P:40N, 132W
0226 at 2005Z; double spiralbracketing in time the MOPITToverpass. Solid stratus deckwith tops at 3.5Kft, otherwiseclear sky. Layer at 4-7 km is agedAsian pollution.
DC-8 CO data(Sachse)
0 50 100 150 200 250 300CO (ppbv)
0
5000
10000
15000
20000
25000
30000
35000
AscentDescent
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RETRIEVAL OF TROPOSPHERIC NO2 FROM GOMEJuly 1996 data [Martin et al., 2001]
Scattering AMF using local shape factors from the GEOS-CHEM model andaccounting for local cloud information (fraction, top, optical depth)
GEOS-CHEM global3-D model with GEIAinventory for NOx (scaled to 1996)
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FORMALDEHYDE COLUMNS FROM GOME:July 1996 means [Palmer et al., 2001]
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MAPPING OF ISOPRENE EMISSIONS BY SCALING OF
GOME FORMALDEHYDE COLUMNS(July 1996)
GEIA
BEIS2
GOME
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SLANT FORMALDEHYDE COLUMNS FROM GOME:Isoprene “volcano” in the Ozarks [Palmer et al., 2001]
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SAMPLE 500 hPa OZONE FIELD AS VIEWED BY TES
GEOS-CHEM datafor Aug. 15, 1994(“real atmosphere”)
…as would be retrieved by TES… (level 2 data)
… and subsequentlyInterpolated (level 3 data)
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THE LONGER-TERM PERSPECTIVE:GEOSTATIONARY OBSERVATIONS
• GIFTS (2004), GEO-TRACE (proposed), GEO-SCIA (proposed)• Observe ozone, CO, NO2, HCHO, aerosols (scattering and
absorbing), water vapor, clouds in nadir• Advantage: continuous observation of continental-scale scene with
high spatial resolution– Resolve synoptic-scale transport, convective outflow– Resolve temporal dependence of emissions– Can be moved in space (or deployed in constellation) to provide
global mapping• Disadvantages
– Distant viewing (compensate by staring)– Low vertical resolution (compensate by high horizontal density
of information)