A177-0018
Spatial and Seasonal Variations of Aerosol Loading and Aerosol Types over South Asia Using Several Satellite-based Datasets

Tuesday, 15 December 2020
Poster
Alaa Mhawish1,2, Meytar Sorek-Hamer3, Robert B Chatfield4, Tirthankar Banerjee5, Muhammad Bilal II6, Manish Kumar7, Chandan Sarangi8, Meredith Franklin9, Khang Chau10, Michael J Garay11 and Olga V. Kalashnikova11, (1)NASA Ames Research Center, Moffett Field, United States, (2)Universities Space Research Association Moffett Field, Institute of Environment and Sustainable Development, Moffett Field, United States, (3)NASA Ames Research Center, USRA, Moffett Field, United States, (4)NASA, Moffett Field, CA, United States, (5)Institute of Environment & Sustainable Development, Banaras Hindu University, Varanasi, India, (6)School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China, (7)Department of Environmental Science , Stockholm University, Department of Environmental Science, Stockholm, Sweden, (8)Indian Institute of Technology, Madras, Department of Civil Engineering, Chennai, India, (9)University of Southern California, Los Angeles, United States, (10)University of Southern California, Los Angeles, CA, United States, (11)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Abstract:
Climatology of aerosol optical and microphysical properties has been analyzed over South Asia using twenty years (2000-2019) of satellite-based aerosol measurements obtained from MISR, MODIS, and OMI sensors. The new high spatial resolution dataset was able to identify aerosol hotspots across the South Asia region. The region showed high Spatio-temporal variability of aerosol loading, and aerosol types with the highest AOD mean observed in monsoon season that highly contributed by small aerosol particles mainly over the eastern coast of India. The small anthropogenic aerosol particles also contribute highly to the total AOD over most India sates and Bangladesh, while the contribution of coarser particles was higher than in dry/semi-dry regions. Postmonsoon showed high aerosol loading dominated by highly absorbing smoke aerosol types mainly over the Northern west Indo-Gangetic Plain (IGP) attributed to the burning of the crop residue. The region is also affected by mixed dust aerosols and carbonaceous aerosols during pre-monsoon and monsoon seasons that enhanced the AAOD mainly over IGP. Our study provides a comprehensive understanding of aerosol properties in terms of size, absorbing properties, and loading over the highly polluted region of South Asia. Finally, the relatively high spatial resolution satellite-based aerosol optical and microphysical properties, showed good potential in identifying the aerosol hotspots and constraint the aerosol types across a highly polluted region of South Asia.
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