Abstract
The NASA GEOS-5 model was used to extend the MERRA reanalysis with five atmospheric aerosol components (sulfates, organic carbon, black carbon, desert dust, and sea-salt). The obtained eight-year (2002–2009) MERRA-driven aerosol reanalysis (MERRAero) dataset was applied to the study of aerosol optical thickness (AOT) trends over the Ganges basin and north-west Bay of Bengal (BoB) in the early post-monsoon season. In October, in the absence of aerosol sources in north-west Bay of Bengal (BoB), MERRAero showed increasing AOT trends over north-west BoB exceeding those over the east of the Ganges basin. Various aerosol components showed strong increasing AOT trends over north-west BoB. Our analysis showed that the AOT trends over north-west BoB were reproduced by GEOS-5, not because of MODIS AOT assimilation, but because of the model capability of reproducing meteorological factors contributing to AOT trends. The following factors contributed to the increasing AOT trend over the area in question in October: an increasing number of days when prevailing winds blew from land to sea, resulting in a drier environment and an increase in air pollution over north-west BoB; wind convergence was observed over north-west BoB causing the accumulation of aerosol particles over that region, when prevailing winds blew from land to sea.
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References
Chin M, Ginoux P, Kinne S, Torres O, Holben B, Duncan BN, Martin RV, Logan J, Higurashi A, Nakajima T (2002) Tropospheric aerosol optical thickness from the GOCART model and comparisons with satellite and sun photometer measurements. J Atmos Phys 59:461–483
Colarco P, da Silva A, Chin M, Diehl T (2010) Online simulations of global aerosol distributions in the NASA GEOS-4 model and comparisons to satellite and ground-based aerosol optical depth. J Geophys Res 115:D14207. doi:10.1029/2009JD012820
Kishcha P, Starobinets B, Long CN, Alpert P (2012) Unexpected increasing AOT trends over north-west Bay of Bengal in the early post-monsoon season”. J Geophys Res 117:D23208. doi:10.1029/2012JD018726
Kishcha P, da Silva A, Starobinets B, Alpert P (2014) Air pollution over the Ganges basin and north-west Bay of Bengal in the early post-monsoon season based on NASA MERRAero data. J Geophys Res 119. doi:10.1002/2013JD020328
Acknowledgements
This study was made with support from and in cooperation with the international Virtual Institute DESERVE (Dead Sea Research Venue), funded by the German Helmholtz Association.
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Kishcha, P., da Silva, A.M., Starobinets, B., Alpert, P. (2014). Modeling of Air Pollution over the Ganges Basin and North-West Bay of Bengal in the Early Post-monsoon Season Using the NASA GEOS-5 Model. In: Steyn, D., Mathur, R. (eds) Air Pollution Modeling and its Application XXIII. Springer Proceedings in Complexity. Springer, Cham. https://doi.org/10.1007/978-3-319-04379-1_98
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DOI: https://doi.org/10.1007/978-3-319-04379-1_98
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