Journal
SCIENCE
Volume 288, Issue 5468, Pages 1042-1047Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.288.5468.1042
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Measurements and models show that enhanced aerosol concentrations can augment cloud albedo not only by increasing total droplet cross-sectional area, but also by reducing precipitation and thereby increasing cloud water content and cloud coverage. Aerosol pollution is expected to exert a net cooling influence on the global climate through these conventional mechanisms. Here, we demonstrate an opposite mechanism through which aerosols can reduce cloud cover and thus significantly offset aerosol-induced radiative cooling at the top of the atmosphere on a regional scale. In model simulations, the daytime clearing of trade cumulus is hastened and intensified by solar heating in dark haze las found over much of the northern Indian Ocean during the northeast monsoon).
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