报告详情
Disproportionate Control on Aerosol Burden by Light Rain
编号：209
访问权限：仅限参会人
更新：2021-06-09 17:04:40 浏览：663次
口头报告
报告开始：2021年07月11日 14:45（Asia/Shanghai）
报告时间：15min
所在会场：[S11A] 11A、大气科学 [S11A-3] 11A、专题5-大气物理和大气探测
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摘要
Atmospheric aerosols are of great climate and environmental importance due to their effects on the Earth’s radiative energy balance and air quality. Aerosol concentrations are strongly influenced by rainfall via wet removal. Global climate models have been used to quantify their climate and health effects. However, they commonly suffer from a well-known problem of “too much light rain and too little heavy rain”. The impact of simulated rainfall intensities on aerosol burden at the global scale is still unclear. Here, we show that rainfall intensity has profound impacts on aerosol burden, and light rain has a disproportionate control on it. By improving the representation of convection, the light rain (1-20 mm d-1) frequency in two state-of-the-art global climate models is reduced. As a result, the aerosol burden is increased globally, especially over the tropics and subtropics, by as much as 0.3 in aerosol optical depth in tropical rain belts. It is attributed to the dominant contribution of light rain to the accumulated wet removal by its frequent occurrence despite its weak intensity. The implication of these findings is that understanding the nature of aerosol scavenging by rainfall is critical to aerosol-climate interaction and its impact on climate.
关键词
aerosol,Precipitation,convection,climate model
报告人
王勇
副教授 清华大学稿件作者
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重要日期
-
会议日期
07月09日
2021
至07月11日
2021
-
05月30日 2021
摘要截稿日期
-
05月30日 2021
初稿截稿日期
-
05月30日 2021
提前注册日期
-
07月10日 2021
注册截止日期
-
07月11日 2021
报告提交截止日期
主办单位
青年地学论坛理事会
承办单位
中国科学院地球化学研究所
贵州大学
贵州大学
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