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Aerosol radiative forcing over a tropical urban site in India

Pandithurai, G and Pinker, RT and Takamura, T and Devara, PCS (2004) Aerosol radiative forcing over a tropical urban site in India. Geophysical Research Letters, 31 (12). L12107 1-4.

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Abstract

Using collocated measurements of aerosol radiative properties and radiative fluxes, aerosol radiative forcing is estimated at a tropical urban site in India, located between the sub-continent and the Indian Ocean Experiment [INDOEX] sites. Observed sun/sky radiance data are used to derive aerosol spectral optical depth, single scattering albedo [SSA], asymmetry parameter, precipitable water and total column ozone. These serve as inputs to a radiative transfer model, to estimate aerosol forcing at the surface, the top-of-the atmosphere [TOA] and the atmosphere. During the dry season of 2001 and 2002 [November–April], these were found to be −33, 0 and 33 Wm−2, respectively. Using measured radiative fluxes during different aerosol loading conditions yield a surface forcing of −31 Wm−2. The surface forcing efficiency as computed from the two independent methods is found to be −88 and −84 Wm−2, respectively, while mean SSA at 500 nm is found to be 0.81

Item Type: Article
Additional Information: Copyright of this article belongs to American Geophysical Union
Uncontrolled Keywords: Ozone; Radiation; Scattering; Spectrum analysis; Surface properties; Water, Radiative fluxes; Sky radiance; Surface forcing; Top-of-the-atmosphere (TOA), Atmospheric aerosols, aerosol property; atmospheric particle; radiative forcing; tropical region; urban atmosphere
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 18 Apr 2015 09:17
Last Modified: 18 Apr 2015 09:17
URI: http://moeseprints.incois.gov.in/id/eprint/1448

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