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

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

Content Provider	Semantic Scholar
Author	Chen, Cheng Dubovik, Oleg Henze, Daven K. Chin, Mian Lapyonok, Tatyana Schuster, Gregory L. Ducos, Fabrice Fuertes, David Litvinov, Pavel Lopatin, Anton Hu, Qiaoyun Torres, Benjamin Cruz
Copyright Year	2019
Abstract	We invert global black carbon (BC), organic carbon (OC) and desert dust (DD) aerosol emissions from POLDER/PARASOL spectral aerosol optical depth (AOD) and aerosol absorption optical depth (AAOD) using the GEOS-Chem inverse modeling framework. Our inverse modeling framework uses standard a priori emissions to provide a posteriori emissions that are constrained by POLDER/PARASOL AODs and AAODs. The following global emission values were retrieved for the three aerosol components: 18.4 Tg yr−1 for BC, 109.9 Tg yr−1 for OC and 731.6 Tg yr−1 for DD for the year 2010. These values show a difference of +166.7 %, +184.0 % and −42.4 %, respectively, with respect to the a priori values of emission inventories used in “standard” GEOS-Chem runs. The model simulations using a posteriori emissions (i.e., retrieved emissions) provide values of 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 the a priori values of emissions. Additionally, the a posteriori model simulation of AOD, AAOD, single scattering albedo, Ångström exponent and absorption Ångström exponent show better agreement with independent AERONET, MODIS and OMI measurements than the a priori simulation. Thus, this study suggests that using satellite-constrained global aerosol emissions in aerosol transport models can improve the accuracy of simulated global aerosol properties.
File Format	PDF HTM / HTML
DOI	10.5194/acp-2019-623
Alternate Webpage(s)	https://www.atmos-chem-phys-discuss.net/acp-2019-623/acp-2019-623.pdf
Alternate Webpage(s)	https://www.atmos-chem-phys.net/19/14585/2019/acp-19-14585-2019.pdf
Alternate Webpage(s)	https://doi.org/10.5194/acp-2019-623
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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