气候变化领域集成服务门户(CCPortal): Wet-to-dry climate shift of the Sichuan Basin during 1961

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DOI	10.1007/s00382-021-05734-8
	Wet-to-dry climate shift of the Sichuan Basin during 1961–2010
	Jia X.J.; Gu Q.; Qian Q.F.; Wu R.
发表日期	2021
ISSN	0930-7575
起始页码	331
结束页码	344
英文摘要	The autumn precipitation over the Sichuan Basin (APSB) experienced a significant wet-to-dry shift around the mid-1980s during the 1961–2010 period. Thus, the dataset is divided into two subperiods, 1961–1985 (P1) and 1986–2010 (P2), which are denoted as the wet period and dry period, respectively. The possible mechanisms accounting for the wet-to-dry shift in the APSB are investigated using both observational data and a baroclinic atmospheric model. Analysis shows that the sea surface temperature (SST) in the tropical Indian-western Pacific (TIWP) regions displays continuous warming during the period under examination, which may intensify the ascent motion over the warm pool and favor the descent motion over the Sichuan Basin. Meanwhile, the Gill-type atmospheric response to anomalous TIWP warm SST is accompanied by anomalous northerly winds prevailing over central and Southwest China. Both the intensified descent motion and anomalous northerly winds over central and Southwest China favor the switch to dry conditions in the APSB. Further analysis shows that the decadal changes in the North Atlantic SST lead to an atmospheric wave pattern prevailing over the extratropical Eurasian continent. An anomalous cyclone over central-eastern Eurasia, which is one component of the wave pattern, is accompanied by significant northerly winds penetrating southward to central China. These northerly winds can cause more-than-normal snow cover around Lake Baikal, which may in turn modulate the atmospheric circulation through positive feedback and therefore result in intensified northerly winds, favorable for the switch to the anomalous dry state of the APSB. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Autumn drought; Climate shift; Sichuan Basin; SST
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/183511
作者单位	Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, ZheJiang University, Hangzhou, Zhejiang, China; Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Jia X.J.,Gu Q.,Qian Q.F.,等. Wet-to-dry climate shift of the Sichuan Basin during 1961–2010[J],2021.
APA	Jia X.J.,Gu Q.,Qian Q.F.,&Wu R..(2021).Wet-to-dry climate shift of the Sichuan Basin during 1961–2010.Climate Dynamics.
MLA	Jia X.J.,et al."Wet-to-dry climate shift of the Sichuan Basin during 1961–2010".Climate Dynamics (2021).