Measurement of the Effect of Amazon Smoke on Inhibition of Cloud Formation

American Association for the Advancement of Science (AAAS) - Tập 303 Số 5662 - Trang 1342-1345 - 2004
Ilan Koren1,2,3, Yoram J. Kaufman1,2,3, L. A. Remer1,2,3, J. Vanderlei Martins1,2,3
1Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD 21250, USA
2NASA Goddard Space Flight Center (GSFC), Greenbelt, MD, 20771, USA
3National Research Council, Washington, DC 20001, USA

Tóm tắt

Urban air pollution and smoke from fires have been modeled to reduce cloud formation by absorbing sunlight, thereby cooling the surface and heating the atmosphere. Satellite data over the Amazon region during the biomass burning season showed that scattered cumulus cloud cover was reduced from 38%in clean conditions to 0%for heavy smoke (optical depth of 1.3). This response to the smoke radiative effect reverses the regional smoke instantaneous forcing of climate from –28 watts per square meter in cloud-free conditions to +8 watts per square meter once the reduction of cloud cover is accounted for.

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This research was performed while I.K. held a National Research Council Research Associateship Award at NASA/GSFC.

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American Association for the Advancement of Science (AAAS)

Tập 303 Số 5662

1342-1345

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