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GEWEX Aerosol Assessment

GEWEX Aerosol Assessment. Panel members Sundar Christopher, Rich Ferrare, Paul Ginoux, Stefan Kinne, Jeff Reid, Paul Stackhouse Program Lead : Hal Maring, Radiation Sciences, NASA HQ. TOMS/Nimbus-7. TOMS/Earth Probe. SeaWiFS. AURA/OMI. PARASOL. MODIS/Terra. MODIS/Aqua. VIIRS.

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GEWEX Aerosol Assessment

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  1. GEWEX Aerosol Assessment Panel members Sundar Christopher, Rich Ferrare, Paul Ginoux, Stefan Kinne, Jeff Reid, Paul Stackhouse Program Lead : Hal Maring, Radiation Sciences, NASA HQ.

  2. TOMS/Nimbus-7 TOMS/Earth Probe SeaWiFS AURA/OMI PARASOL MODIS/Terra MODIS/Aqua VIIRS NPP/NPOESS 1979 1982 1985 1988 1991 1994 1997 2000 2003 2006 2009 2012 AVHRR/NOAA-series (7 and on) Aerosol Data Record Time Series TOMS/Nimbus-7: 11/1/1978 - 5/6/1993, Earth Probe 7/96 – 5/01 AVHRR: NOAA-series August 1981 – present SeaWiFS: September 1997 – present MODIS Terra: February 2000 – present MODIS Aqua: July 2002 – present NPP VIIRS: 2010 – Courtesy, C. Hsu

  3. Near Future Afternoon Constellation- “A-Train” Aerosols MODIS, OMI, POLDER 2 1:30 PM 1:38 PM 1:15 PM Aqua CALIPSO Cloudsat OCO - CO2 column PARASOL OCO Aura CALPSO- Aerosol and cloud heights Cloudsat - cloud droplets PARASOL - aerosol and cloud polarization

  4. Goals • To assess long term (AVHRR based, i.e., GACP), against EOS Terra/A-Train (MODIS, MISR, OMI) and other (PARASOL) aerosol products. • Intercomparison, uncertainties, sensitivities at various space and time scales • Reliability of variability in long-term data products • Comparability to model results?

  5. Initial Strategy • Initial Parameter: AOD only (550 nm) • Initial Temporal and Spatial Scales • 1ox1o horizontal resolution • 60oN to 60oS; Ocean-only • Years: 2000-2008 • Initial Analysis • Daily, monthly, seasonal, yearly scales • Relevant statistics for each 1ox1o degree grids including number of pixels that went into calculating mean, median, etc… statistics • Initial Data Sets: • Tier 1 : AVHRR, MISR, MODIS (Collection 5 and Deep Blue), OMI, POLDER (PARASOL). • Tier 2 : TOMS, MISR (Research), MODIS (Ocean Color), ATSR, SeaWIFS • Third tier (Experimental) : AIRS, GASP, SEVIRI, and others • Data Archive: Goddard (Greg Leptoukh, manager); access to GIOVANNI and other tools • Involve science teams: participate in aerosol product survey • Connection to AEROCOM

  6. Tier 1 Products for Initial Assessment

  7. Aerosol Product Survey • Questions: • Product name, sensor, satellite, description • Surface type, total coverage (time and space) • AOT wavelengths, fine fractions, SSA wavelengths, other products • Product resolution, version history, references and web sites • Beginning, ending dates • Principle investigator information • Sensors and Respondents to Date: • AVHRR-GISS GACP (Mischenko), AVHRR-NOAA PATMOS (Zhao), CALIOP (Winker), Deep Blue MODIS/SeaWifs (Hsu), GOES Imager (Kondragunta), MISR (Kahn), MODIS Land (Levy), POLDER (Tanre), VIRS-TRMM (Zhao), CERES/MODIS-SSF (Zhao).

  8. Current Progress/Next Steps • Two Panel Meetings Held • Initial strategy devised and needs refinement • Data archive selected • Formats for various grid and parameters - TBD • Form Participant Team • Complete and assimilate satellite data product survey => some feedback obtained already • Develop white paper with participants • Formalize phase 1 strategy • Begin phase 1 assessment work

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