P. C. S. Devara

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Light scattering and absorption properties of atmospheric aerosols are of vital importance for evaluating their types, sources and radiative forcing. This is of particular interest over the Gangetic–Himalayan (GH) region due to uplift of aerosol from the plains to the Himalayan range, causing serious effects on atmospheric heating, glaciology and monsoon(More)
Simultaneous measurements on physical, chemical and optical properties of aerosols over a tropical semi-arid location, Agra in north India, were undertaken during December 2004. The average concentration of total suspended particulates (TSP) increased by about 1.4 times during intense foggy/hazy days. Concentrations of SO4 , NO3 , NH4 + and Black Carbon(More)
BACKGROUND There is an urgent need for an improved understanding of the sources, distributions and properties of atmospheric aerosol in order to control the atmospheric pollution over northeastern Himalayas where rising anthropogenic interferences from rapid urbanization and development is becoming an increasing concern. METHODOLOGY/PRINCIPAL FINDINGS An(More)
Spatio-temporal aerosol optical characteristics over the Arabian Sea during the pre monsoon season D. G. Kaskaoutis, M. C. R. Kalapureddy, P. C. S. Devara, P. G. Kosmopoulos, P. T. Nastos, K. Krishna Moorthy, and H. D. Kambezidis Atmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens,(More)
This paper presents the results of the lidar experiments that have been performed during January 1989 through August 1990 to study the aerosol vertical distributions in the nocturnal atmosphere and their comparison with near-simultaneous aerological soundings for environmental monitoring. During the study period, the aerosol distributions showed significant(More)
Vertical profiles of black carbon (BC) aerosol were determined from aircraft measurements under the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) program conducted by the Indian Institute of Tropical Meteorology, India during 2009 over Bangalore and Hyderabad in south India. BC mass loadings decreased approximately(More)
Using aerosol optical depth (AOD at 550 nm) from the moderate-resolution imaging spectroradiometer, surface winds, outgoing long-wave radiation from National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis, and rainfall from Tropical Rainfall Measuring Mission data sets, we report a dipolelike variability in the(More)
Multi-channel sun photometer observations of precipitable water content (PWC) in the near-infrared band over a tropical Indian station, Pune, during the period May 1998-May 2006 have been used to investigate temporal and seasonal variations. Precipitable water estimated from surface meteorological parameters (temperature and relative humidity) and that(More)