Presentation Details
Disproportionate Control on Aerosol Burden by Light Rain
ID：209
View Protection：ATTENDEE
Updated Time：2021-06-09 17:04:40 Hits：1991
Oral Presentation
Start Time：2021-07-11 14:45（Asia/Shanghai）
Duration：15min
Session：S11A 11A、大气科学 »
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Abstract
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.
Keywords
aerosol,Precipitation,convection,climate model
Speaker
王勇
副教授 清华大学Submission Author
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Important Date
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Conference Date
Jul 09
2021
toJul 11
2021
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May 30 2021
Abstract Submission Deadline
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May 30 2021
Draft paper submission deadline
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May 30 2021
Early Bird Registration
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Jul 10 2021
Registration deadline
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Jul 11 2021
Contribution Submission Deadline
Sponsored By
青年地学论坛理事会
Organized By
中国科学院地球化学研究所
贵州大学
贵州大学
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