Impact of aerosol indirect effect on surface temperature over East Asia

被引:127
作者
Huang, Y
Dickinson, RE
Chameides, WL
机构
[1] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
[2] Environm Def, New York Off, New York, NY 10010 USA
关键词
anthropogenic aerosols; diurnal temperature range; long-wave radiative forcing; regional climate change; second indirect effect;
D O I
10.1073/pnas.0504428103
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
A regional coupled climate-chemistry-aerosol model is developed to examine the impacts of anthropogenic aerosols on surface temperature and precipitation over East Asia. Besides their direct and indirect reduction of short-wave solar radiation, the increased cloudiness and cloud liquid water generate a substantial downward positive long-wave surface forcing; consequently, nighttime temperature in winter increases by + 0.7 degrees C, and the diurnal temperature range decreases by - 0.7 degrees C averaged over the industrialized parts of China. Confidence in the simulated results is limited by uncertainties in model cloud physics. However, they are broadly consistent with the observed diurnal temperature range decrease as reported in China, suggesting that changes in downward long-wave radiation at the surface are important in understanding temperature changes from aerosols.
引用
收藏
页码:4371 / 4376
页数:6
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