气候变化领域集成服务门户(CCPortal): How Does the Tibetan Plateau Dynamically Affect Downstream Monsoon Precipitation?

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DOI	10.1029/2020GL090543
	How Does the Tibetan Plateau Dynamically Affect Downstream Monsoon Precipitation?
	Son J.-H.; Seo K.-H.; Wang B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	Recent studies have demonstrated that mechanical effects have a greater contribution to the East Asian summer monsoon (EASM) than thermodynamical effects. However, a theoretical basis for the underlying dynamical mechanism has not been elucidated. The present study shows that topographically forced barotropic Rossby wave theory well explains the seasonal evolution of the monsoonal precipitation and its amplitude and peak location. The subtropical zonal wind impinging on the Tibetan Plateau is a key factor, and the resulting downstream cyclonic and anticyclonic circulation anomalies form a peak zonal geopotential height gradient in between, leading to the development of the meridional wind and the accompanying moisture transport to the EASM region. As the season approaches the summer monsoon period, the peak geopotential height gradient—thus the monsoonal rainband—shifts to the west from the western North Pacific to East Asia. The findings in this study can be applied to subtropical monsoons worldwide. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Mechanical waves; Tropics; Anticyclonic circulation; Dynamical mechanisms; East Asian summer monsoon; Geo-potential heights; Moisture transport; Monsoon precipitation; Monsoonal precipitation; Western North Pacific; Atmospheric thermodynamics; amplitude; geopotential; moisture transfer; monsoon; precipitation (climatology); Rossby wave; subtropical region; thermodynamics; topography; zonal wind; China; Pacific Ocean; Pacific Ocean (North); Qinghai-Xizang Plateau
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/169334
作者单位	Research Center for Climate Science, Pusan National University, Busan, South Korea; Department of Atmospheric Sciences, Division of Earth Environmental System, Pusan National University, Busan, South Korea; Department of Atmospheric Sciences, IPRC, University of Hawai‘i at Mānoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Son J.-H.,Seo K.-H.,Wang B.. How Does the Tibetan Plateau Dynamically Affect Downstream Monsoon Precipitation?[J],2020,47(23).
APA	Son J.-H.,Seo K.-H.,&Wang B..(2020).How Does the Tibetan Plateau Dynamically Affect Downstream Monsoon Precipitation?.Geophysical Research Letters,47(23).
MLA	Son J.-H.,et al."How Does the Tibetan Plateau Dynamically Affect Downstream Monsoon Precipitation?".Geophysical Research Letters 47.23(2020).