气候变化领域集成服务门户(CCPortal): Impact of middle east dust on subseasonal-to-seasonal variability of the Asian summer monsoon

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DOI	10.1007/s00382-021-05694-z
	Impact of middle east dust on subseasonal-to-seasonal variability of the Asian summer monsoon
	Wang M.; Lau W.K.M.; Wang J.
发表日期	2021
ISSN	0930-7575
起始页码	2075
结束页码	2093
英文摘要	We investigated the effect of increased spring (April–May) dust aerosol over the Arabian Peninsula (AP) on the subseasonal-to-seasonal (S2S) variability of the Asian summer monsoon (ASM) using MERRA-2 re-analysis data (1980–2018). Result shows that abundant AP spring dust leads to more dust covering the AP and Pakistan northwestern India (PNWI) during May–June, causing a cooler land surface and a warmer lower and middle atmosphere with enhanced local atmospheric stability. However, the warmer atmosphere increases the meridional temperature gradient, boosting moisture transport from the Arabian Sea to PNWI, causing increased convective potential energy in PNWI region. As season advances, the accumulated convection potential energy eventually breaks through the local stability, via the elevated heat pump (EHP) effect, increasing precipitation over PNWI. In July and August, cloud radiation-circulation feedback further enhances the warming of the upper troposphere, strengthening precipitation in PNWI. Dynamical adjustments of large-scale circulations induced by the feedback strongly modulate ASM precipitation. Over southern and central China, precipitation is reduced, in conjunction with a contraction of South Asian High, and the development of an anomalous east-to-west oriented upper-level wavetrain in July. In August, the upper level wavetrain undergoes strong wave-mean flow interaction, culminating in the development of an anticyclonic center with drought conditions over northeast China, Korea and Japan. Over the Indian subcontinent, increased precipitation in PNWI plays an important role in initiating the EHP feedback leading to increased precipitation over the Indian subcontinent, and in modulating the jetstream-wave interaction in downstream East Asian regions in July–August. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
英文关键词	Asian summer monsoon; Dust aerosol; Middle east; Subseasonal to seasonal variability
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183549
作者单位	Joint Center for Data Assimilation Research and Applications/Key Laboratory of Meteorological Disaster, Ministry of Education/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center On Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, United States; Department of Atmospheric and Oceanic Sciences, University of Maryland, College Park, MD 20740, United States; International Institute for Earth System Science, Nanjing University, Nanjing, Jiangsu 210023, China; Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Key Laboratory for Land Satellite Remote Sensing Applications...
推荐引用方式 GB/T 7714	Wang M.,Lau W.K.M.,Wang J.. Impact of middle east dust on subseasonal-to-seasonal variability of the Asian summer monsoon[J],2021.
APA	Wang M.,Lau W.K.M.,&Wang J..(2021).Impact of middle east dust on subseasonal-to-seasonal variability of the Asian summer monsoon.Climate Dynamics.
MLA	Wang M.,et al."Impact of middle east dust on subseasonal-to-seasonal variability of the Asian summer monsoon".Climate Dynamics (2021).