Smoke invigoration versus inhibition of clouds over the Amazon

被引：350

作者：

Koren, Ilan ^{[1
]}

Martins, J. Vanderlei ^{[2
,3
,4
]}

Remer, Lorraine A. ^{[4
]}

Afargan, Hila ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Environm Sci, IL-76100 Rehovot, Israel

[2] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[3] Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21250 USA

[4] NASA, Atmospheres Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

SCIENCE | 2008年 / 321卷 / 5891期

关键词：

D O I：

10.1126/science.1159185

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The effect of anthropogenic aerosols on clouds is one of the most important and least understood aspects of human- induced climate change. Small changes in the amount of cloud coverage can produce a climate forcing equivalent in magnitude and opposite in sign to that caused by anthropogenic greenhouse gases, and changes in cloud height can shift the effect of clouds from cooling to warming. Focusing on the Amazon, we show a smooth transition between two opposing effects of aerosols on clouds: the microphysical and the radiative. We show how a feedback between the optical properties of aerosols and the cloud fraction can modify the aerosol forcing, changing the total radiative energy and redistributing it over the atmospheric column.

引用

页码：946 / 949

页数：4

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