ANALYSIS OF FINE PARTICULATE MATTER PM10 AND PM2.5 IN THE CITY OF VISAKHAPATNAM, INDIAKAVITHA CHANDU AND MADHAVAPRASAD DASARIAbstract Mass concentrations of PM2.5 and PM10 over different time scales during each season of the year were measured from March 1, 2018 to February 28, 2019 in port city of Visakhapatnam (17.6868° N, 83.2185° E) located on the east coast of India. The city is studded with 14 major industries and surrounded on the three sides by the mountains and the Bay of Bengal on the fourth side. It is effectively shielded from many winds, with only marine air moving into the basin. Highest and lowest values of PM concentrations occurred in winter and summer respectively. The diurnal changes of PM2.5/PM10 mass concentrations were calculated for different seasons to identify dominant particulate matter pollution. The results indicate the fine particles arise from anthropogenic sources. The R-squared value of linear regression between PM2.5 and PM10 is high with highest being 0.95 during winter season indicating coherence between them. |