Abstract
Aerosol optical depth (AOD) measurement done with MICROTOPS II Sunphotometer carried out East Indian region Kharagpur (KGP) one year duration data collected every hourly in day time (jun2013may2014) for the source region identification. The seasonal comparison shown that high AOD shown in the summer (April, May) with higher AOD (0.75 ± 0.12) and low AOD in Monsoon (0.50 ± 0.18) (June, July, August, September).other seasons are Twinter, winter, NE monsoon, Tsummer AOD values will be (0.57 ± 0.23), (0.67 ± 0.16), (0.63 ± 0.16), (0.69 ± 0.16), respectively. The second objective is the concentrated weighted trajectories (CWT) analysis to potential source regions based on the 7-day back trajectory calculation from HYSPLIT model at the surface level and elevated level trajectories considered. this study we observed that the central India is the source region for monsoon season at surface level trajectories the winter season follows the IGP is source region and the summer has the two paths of sources were one is from IGP and coastal region. The pollutants are dispersed based on the wind direction.
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