气候变化领域集成服务门户(CCPortal): Tibetan Plateau heating as a driver of monsoon rainfall variability in Pakistan

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DOI	10.1007/s00382-018-4507-6
	Tibetan Plateau heating as a driver of monsoon rainfall variability in Pakistan
	Wang Z.; Yang S.; Duan A.; Hua W.; Ullah K.; Liu S.
发表日期	2019
ISSN	0930-7575
起始页码	6121
结束页码	6130
卷号	52 期号:2020-09-10
英文摘要	Pakistan summer monsoon rainfall consists of a large portion of the local annual total rainfall, and in the recent monsoon seasons, prolonged periods of anomalous rainfall and excessive flooding have appeared in Pakistan. A full understanding of the monsoon rainfall variability is important for the sustainable development of the country. Based on multiple data analyses and the weather research and forecasting model, the potential impact of Tibetan Plateau (TP) heating on the interannual variability of Pakistan monsoon rainfall is investigated. It is observed that a significant negative relationship exists between the thermal forcing over the southeastern TP and Pakistan monsoon rainfall in July–August. Both the data analyses and model sensitivity experiments identify that the TP heating drives a Rossby wave response in the upper atmosphere characterized with an anticyclonic anomaly over the southern TP but a cyclonic anomaly to the north. This dipole pattern of anomalous circulation induces an evident upper-level convergence over Pakistan, corresponding with remarkable vertical sinking motion. Meanwhile, in the lower troposphere, the TP heating causes anomalous westerly wind along the Himalayas over the northern India continent. Such westerly anomaly further induces less water vapor transport into Pakistan from the Bay of Bengal. Therefore, both the dynamic and thermodynamic processes regulated by positive TP heating are not beneficial for the occurrence of monsoon rainfall in Pakistan. This study proposes a new potential mechanism in which TP heating acts as a driver of Pakistan monsoon rainfall variability on interannual time scales. © 2018, The Author(s).
英文关键词	Interannual variability; Pakistan monsoon rainfall; Thermal forcing; Tibetan Plateau
语种	英语
scopus关键词	annual variation; climate forcing; climate modeling; heating; monsoon; precipitation (climatology); China; Pakistan; Qinghai-Xizang Plateau
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/146317
作者单位	School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, 510275, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, China; Department of Meteorology, COMSATS Institute of Information Technology, Islamabad, Pakistan
推荐引用方式 GB/T 7714	Wang Z.,Yang S.,Duan A.,et al. Tibetan Plateau heating as a driver of monsoon rainfall variability in Pakistan[J],2019,52(2020-09-10).
APA	Wang Z.,Yang S.,Duan A.,Hua W.,Ullah K.,&Liu S..(2019).Tibetan Plateau heating as a driver of monsoon rainfall variability in Pakistan.Climate Dynamics,52(2020-09-10).
MLA	Wang Z.,et al."Tibetan Plateau heating as a driver of monsoon rainfall variability in Pakistan".Climate Dynamics 52.2020-09-10(2019).