Abstract

ABSTRACTThe weather/climate of south India is entirely different from that of north India. So the aerosol loading and variability in the regions also show considerable difference. The present study investigates the aerosol distribution over the south Indian region. The transport of aerosols over the region is studied in detail and climate features of the region are investigated to understand the aerosol distribution of the region. In situ observations available in two stations in the west coast and equatorial Indian region and satellite data available for the region are used for the analysis. Aerosol concentration is less in south India compared to that in north India with AOD (aerosol optical depth) values above 0.5 in north India and below 0.4 in south India. The studies reveal the seasonal variability in aerosol loading with high aerosol concentration during summer (>0.4) and less loading during winter season (<0.3) in south India. In situ aerosol observations taken for the first time in Cochin station implies variability in coarse mode aerosols with AOD near 0.3 in summer and near 0.2 in winter. The seas surrounding south India have significant impact in the aerosol loading as they are the sources of marine aerosols such as sea-salt, sulphates etc. Exchange of aerosols takes place from the marine environment and land regions over south India and surroundings. The coastal region of south India experiences high aerosol loading during June to August period. Different climate pattern of the region and the presence of adjoining seas lead to a mixed aerosol content, which includes aerosols of marine and continental origin. In north India, anthropogenic and natural aerosols such as dust, black carbon etc. are dominant in the atmosphere.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call