Effect of aerosols on erythemal ultraviolet radiation

Abstract

56-61The present study reports, for the first time, on seasonal variation of UV erythema (UVery) and its relation with aerosols over a typical urban environment of Hyderabad, India during 2001-2003. Drastic reduction in UV intensities has been observed during periods of high aerosol loading. Comparison of UVery intensities with aerosol optical depth on normal summer day and a day after heavy rainfall suggests ~45% increase in UVery intensities because of scavenging of particles in the atmosphere. Total columnar ozone showed negative correlation with UVery. The results are discussed in the paper