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. We invert global black carbon (BC), organic carbon (OC)and desert dust (DD) aerosol emissions from POLDER/PARASOL spectral aerosoloptical depth (AOD) and aerosol absorption optical depth (AAOD) using theGEOS-Chem inverse modeling framework. Our inverse modeling framework usesstandard a priori emissions to provide a posteriori emissions that are constrained byPOLDER/PARASOL AODs and AAODs. The following global emission values wereretrieved for the three aerosol components: 18.4 Tg yr−1 for BC, 109.9 Tg yr−1for OC and 731.6 Tg yr−1 for DD for the year 2010. These values show adifference of +166.7 %, +184.0 % and−42.4 %, respectively, with respect to thea priori values of emission inventories used in “standard” GEOS-Chem runs. Themodel simulations using a posteriori emissions (i.e., retrieved emissions) provide valuesof 0.119 for global mean AOD and 0.0071 for AAOD at 550 nm, which are+13.3 % and +82.1 %, respectively, higher than the AOD and AAOD obtained using thea priori values of emissions. Additionally, the a posteriori model simulation of AOD, AAOD,single scattering albedo, Ångström exponent and absorptionÅngström exponent show better agreement with independent AERONET,MODIS and OMI measurements than the a priori simulation. Thus, this study suggeststhat using satellite-constrained global aerosol emissions in aerosoltransport models can improve the accuracy of simulated global aerosolproperties.

Constraining global aerosol emissions using POLDER/PARASOL satellite remote sensing observations