气候变化领域集成服务门户(CCPortal): Impact of Dust Shortwave Absorbability on the East Asian Summer Monsoon

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DOI	10.1029/2020GL089585
	Impact of Dust Shortwave Absorbability on the East Asian Summer Monsoon
	Wang Z.; Bi L.; Jia X.; Yi B.; Lin X.; Zhang F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Dust shortwave absorbability suffers from significant uncertainties. We investigated the radiative effects of dust aerosols from the circum-Tibet region using four shortwave absorbability schemes and examined their impacts on the East Asian summer monsoon by using the Community Earth System Model (CESM). We adopted superspheroidal models to compute dust aerosol optical properties and found that more absorptive particles have larger asymmetry factor and lower single-scattering albedo. Meiyu precipitation, as a part of the East Asian summer monsoon, is weakened by dust aerosols, particularly for the convective precipitation. The mechanism is that dust aerosols transported mainly from the Gobi desert radiatively heat the lower atmosphere to the north of the Meiyu rainband and decrease the meridional temperature gradient, leading to the weakening of the midtropospheric westerly jet over the Meiyu rainband, which is important for convection. More absorptive dust aerosols with a stronger radiative heating effect inhibit more convective Meiyu precipitation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Atmospheric thermodynamics; Optical properties; Asymmetry factor; Convective precipitation; Earth system model; East Asian summer monsoon; Meridional temperature gradient; Radiative effects; Radiative heating; Single scattering albedo; Dust; aerosol; albedo; asymmetry; convection; monsoon; numerical model; precipitation (climatology); radiative transfer; rainband; temperature gradient; China; Xizang
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169613
作者单位	Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou, China; School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Zhuhai, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Wang Z.,Bi L.,Jia X.,et al. Impact of Dust Shortwave Absorbability on the East Asian Summer Monsoon[J],2020,47(19).
APA	Wang Z.,Bi L.,Jia X.,Yi B.,Lin X.,&Zhang F..(2020).Impact of Dust Shortwave Absorbability on the East Asian Summer Monsoon.Geophysical Research Letters,47(19).
MLA	Wang Z.,et al."Impact of Dust Shortwave Absorbability on the East Asian Summer Monsoon".Geophysical Research Letters 47.19(2020).