气候变化领域集成服务门户(CCPortal): Impact of late spring Siberian snow on summer rainfall in South-Central China

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DOI	10.1007/s00382-020-05206-5
	Impact of late spring Siberian snow on summer rainfall in South-Central China
	Shen H.; Li F.; He S.; Orsolini Y.J.; Li J.
发表日期	2020
ISSN	0930-7575
起始页码	3803
结束页码	3818
卷号	54
英文摘要	Located in the Yangtze River Valley and surrounded by mountains, South-Central China (SCC) frequently suffered from natural disasters such as torrential precipitation, landslide and debris flow. Here we provide corroborative evidence for a link between the late spring (May) snow water equivalent (SWE) over Siberia and the summer (July–August, abbr. JA) rainfall in SCC. We show that, in May, anomalously low SWE over Siberia is robustly related to a large warming from the surface to the mid-troposphere, and to a stationary Rossby wave train from Siberia eastward toward the North Atlantic. On the one hand, over the North Atlantic there exhibits a tripole pattern response of sea surface temperature anomalies in May. It persists to some extent in JA and in turn triggers a wave train propagating downstream across Eurasia and along the Asian jet, as the so-called Silk Road pattern (SRP). On the other hand, over northern Siberia the drier soil occurs in JA, accompanied by an overlying anomalous anticyclone through the positive feedback. This anomalous anticyclone favors the tropospheric cooling over southern Siberia, and the meridional (northward) displacement of the Asian jet (JMD) due to the change in the meridional temperature gradient. The combination of the SRP and the JMD facilitates less water vapor transport from the tropical oceans and anomalous descending motion over SCC, and thus suppresses the precipitation. These findings indicate that May Siberian SWE can be exploited for seasonal predictability of SCC precipitation. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Precipitation in South-Central China; Sea surface temperature over the North Atlantic; Siberian snow water equivalent; Siberian soil moisture; The meridional displacement of the Asian jet; The Silk Road pattern
语种	英语
scopus关键词	anticyclone; cooling; jet stream; rainfall; Rossby wave; snow; snow water equivalent; spring (season); summer; troposphere; warming; China; Siberia
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/145508
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; Power Dispatching Control Center, China Southern Power Grid Company Limited, Guangzhou, China; Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; NILU - Norwegian Institute for Air Research, Kjeller, Norway
推荐引用方式 GB/T 7714	Shen H.,Li F.,He S.,et al. Impact of late spring Siberian snow on summer rainfall in South-Central China[J],2020,54.
APA	Shen H.,Li F.,He S.,Orsolini Y.J.,&Li J..(2020).Impact of late spring Siberian snow on summer rainfall in South-Central China.Climate Dynamics,54.
MLA	Shen H.,et al."Impact of late spring Siberian snow on summer rainfall in South-Central China".Climate Dynamics 54(2020).