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Large Aerosol Optical Depths Observed at an Urban Location in Southern India associated with Rain-Deficit Summer Monsoon Season

Vinoj, V and Satheesh, SK and Babu, Suresh S and Moorthy, Krishna K (2004) Large Aerosol Optical Depths Observed at an Urban Location in Southern India associated with Rain-Deficit Summer Monsoon Season. In: Annales Geophysicae, 22 (8). pp. 3073-3077.

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Abstract

Aerosol spectral optical depth (AOD) measurements were made covering three years (2001, 2002 and 2003) at an urban continental location,Bangalore (13degrees N, 77.6degrees E) in India. These ground-based observations have shown that AODs reach a maximum during April (similarto0.5 at 500 nm) and minimum during the November to January period(similar to0.2). The Angstrom wavelength exponent (ce) was - LI during the dry season (December to April), which, in conjunction with the highoptical depth indicates significant anthropogenic influence. Seasonal variations in AODs appear to have an association with monsoon rainfall.Large AODs (a-1.4) were observed during the rain-deficit summer monsoon season (SMS) of 2002, which persisted for more than six months.Enhancement in AODs during SMS 2002 was similar to0.15 (at 500 nm),compared to 2001 and 2003.

Item Type: Journal Article
Keywords: Aerosols and particles (0305);Pollution-urban arid regional (0345);Radiative processes (3359)
Department/Centre: Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 24 Feb 2005
Last Modified: 19 Sep 2010 04:18
URI: http://eprints.iisc.ernet.in/id/eprint/2845

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