V.L. Kiranmai, NTU-Ananathapur, Ananthapur, Andhra Pradesh, India.
P. Vishnu Prasanth, Sri Vidyanikethan Engineering Colleger, Rangampet, Andhra Pradesh, India.
T. Kiran Kumar, Sri Venkateswara University, Tirupathi.
Abstract
Study of atmospheric aerosols is very complex owing to their short life
time and, chemical constituents. Aerosol loading is highly regional and there life
time is very short.An attempt has been made in this paper to study the variability
of atmospheric aerosols over Indian subcontinent using a statistical parameter
Coefficient of Variation (COV). The magnitude of variability over this region is
studied. The factors influencing the variability are studied to find the reasons for
difference in magnitude over different regions. Rainfall naturally influences the
variability aerosols due to scavenging, but if it is the only factor influencing the
variability, the study is absurd. It is found that the influence of rainfall on COV is
not pronounced as it is not a seasonal phenomenon. Influence of other parameters
viz. Topography, wind vector, thermal power plants and population on variability
of aerosols is clearly found. These results help in classifying aerosol zones on the
basis of variability of aerosol optical depth. The study also helps in finding the
cause of aerosol loading over a region. Measures can be taken to decrease the
loading if it is due to local sources.