The Study of Aerosols Optical Depth around Visakhapatnam, a Coastal Region

摘要

Aerosols concentration are high in VSKP and show maritime nature the So2 concentrations are relatively high in industrial and traffic junctions and low in the residential areas. The humidity oxides So2, So3 and so much to so So2 concentrations are high. Wind speed plays a very important role in dilution on built of So2 concentration. AOD is also related to particular air pollutants namely suspended particulates The Particulate pollution is high in industrial area compared to commercial and residential areas. The Iron concentration is high throughout the city because of impact of Iron ore conveyor belt. In this article the AOD of 550 nm shows a maximum in summer that is March that is followed by June. However the 860 nm AOD consistent shows a maximum in May and June period. While the AOD 550nm and 860nm are shows low concentrations in the month of February followed by November. ).We have observed for all the six years a gradual trend followed by a decrease up to winter. In the year 2005 there is no significant change, but maximum values occur in monsoon season. In all the six years the AOD values are maximum in the month of June.