Pre-monsoon Study of Aerosol Parameters and Particulate Matters over Varanasi for 2017

Aerosol characteristics over Varanasi region during pre-monsoon (April - June) period were analyzed for year 2017. Aerosol optical properties and angstrom exponent were measured using MICROTOPS-II Sunphotometer. The mean AOD for the period of study was found to be 0.78 where as mean angstrom exponent (AE at 440 - 870 nm) was found to be 0.29. Average concentrations of PM
2.5
and PM
10
were found to be 38.15 ± 22.48 µg/m
³
and 126.10 ± 45.39 µg/m
³
respectively, which clearly demonstrates dominance of coarse mode particles particularly in this season.