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Contribution of sea-salt to aerosol optical depth over the Arabian Sea derived from MODIS observations

Satheesh, SK and Srinivasan, J and Moorthy, KK (2006) Contribution of sea-salt to aerosol optical depth over the Arabian Sea derived from MODIS observations. In: Geophysical Research Letters, 33 (3). pp. 1-4.

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Official URL: http://www.agu.org/pubs/crossref/2006/2005GL024856...

Abstract

Making use of aerosol optical depths (AOD) derived from MODIS (onboard TERRA satellite) and winds from NCEP, and the fact that sea-salt optical depth over ocean is determined primarily by sea-surface wind speed, we examine the contribution of sea-salt to the composite aerosol optical depth ( AOD) over Arabian Sea ( AS), by developing empirical models for characterizing wind-speed dependence of sea-salt optical depth. We show that at high wind speeds, sea-salt contributes 81% to the coarse mode and 42% to the composite AOD in the southern AS. In contrast to this, over the northern AS, share of sea-salt to coarse mode and composite optical depth is only 35% and 16% respectively. Comparison of the sea-salt optical depth and coarse mode optical depth ( MODIS) showed excellent agreement. The sea-salt optical depth over AS at moderate to high wind speed is comparable to the anthropogenic AOD reported for this region during winter.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Geophysical Union.
Department/Centre: Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 16 Sep 2010 09:48
Last Modified: 16 Sep 2010 09:48
URI: http://eprints.iisc.ernet.in/id/eprint/31817

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