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Calculating AODs from MODIS radiances

Calculating AODs from MODIS radiances. July 3, 2004. July 22, 2004. Easan Drury G4 - w/ Jacob group @ Harvard. Inferring AODs from MODIS radiances ( and using MODIS radiances as the observational variable for constraining modeled aerosols ). α AEROSOL. α MOLECULAR. α SURFACE.

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Calculating AODs from MODIS radiances

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  1. Calculating AODs from MODIS radiances July 3, 2004 July 22, 2004 Easan DruryG4 - w/ Jacob group @ Harvard

  2. Inferring AODs from MODIS radiances ( and using MODIS radiances as the observational variable for constraining modeled aerosols ) αAEROSOL αMOLECULAR αSURFACE What we want! 2nd assumption 1st assumption αSURFACE αMOLECULAR αAEROSOL Molecular scattering & absorbing Aerosol scattering & absorbing Surface reflectance

  3. Inferring Surface Albedo Reflectance ratios during July-August, 2004: Visible to IR reflectances: • Top of the atmosphere reflectance for the 1x1.25 degree bin. • Regress the bottom quartile of visible to IR reflectance.

  4. GEOS-Chem optical properties

  5. Difference in 10x10km2 MODIS and AERONET AODs MODIS & AERONET AODs AERONET - MODIS AODs Fraction of Pixels used

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