气候变化领域集成服务门户(CCPortal): Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China

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DOI	10.1007/s00382-018-4170-y
	Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China
	Xu K.; Huang Q.-L.; Tam C.-Y.; Wang W.; Chen S.; Zhu C.
发表日期	2019
ISSN	0930-7575
起始页码	523
结束页码	538
卷号	52 期号:2020-01-02
英文摘要	The impacts of the eastern-Pacific (EP) and central-Pacific (CP) El Niño-Southern Oscillation (ENSO) on the southern China wintertime rainfall (SCWR) have been investigated. Results show that wintertime rainfall over most stations in southern China is enhanced (suppressed) during the EP (CP) El Niño, which are attributed to different atmospheric responses in the western North Pacific (WNP) and South China Sea (SCS) during two types of ENSO. When EP El Niño occurs, an anomalous low-level anticyclone is present over WNP/the Philippines region, resulting in stronger-than-normal southwesterlies over SCS. Such a wind branch acts to suppress East Asian winter monsoon (EAWM) and enhance moisture supply, implying surplus SCWR. During CP El Niño, however, anomalous sinking and low-level anticyclonic flow are found to cover a broad region in SCS. These circulation features are associated with moisture divergence over the northern part of SCS and suppressed SCWR. General circulation model experiments have also been conducted to study influence of various tropical sea surface temperature (SST) patterns on the EAWM atmospheric circulation. For EP El Niño, formation of anomalous low-level WNP anticyclone is jointly attributed to positive/negative SST anomalies (SSTA) over the central-to-eastern/ western equatorial Pacific. However, both positive and negative CP Niño-related-SSTA, located respectively over the central Pacific and WNP/SCS, offset each other and contribute a weak but broad-scale anticyclone centered at SCS. These results suggest that, besides the vital role of SST warming, SST cooling over SCS/WNP during two types of El Niño should be considered carefully for understanding the El Niño-EAWM relationship. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Anomalous anticyclone; Central-Pacific El Niño; East Asian winter monsoon; Eastern-Pacific El Niño; Southern China wintertime rainfall
语种	英语
scopus关键词	anticyclone; El Nino-Southern Oscillation; general circulation model; monsoon; precipitation (climatology); sea surface temperature; winter; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (East); Philippines; South China Sea
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/146621
作者单位	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Earth System Science Programme, The Chinese University of Hong Kong, Hong Kong; Jiangmen Meteorological Service, Jiangmen, China; State Key Laboratory of Severe Weather (LASW) and Institute of Climate System, Chinese Academy of Meteorological Sciences, Beijing, China
推荐引用方式 GB/T 7714	Xu K.,Huang Q.-L.,Tam C.-Y.,et al. Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China[J],2019,52(2020-01-02).
APA	Xu K.,Huang Q.-L.,Tam C.-Y.,Wang W.,Chen S.,&Zhu C..(2019).Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China.Climate Dynamics,52(2020-01-02).
MLA	Xu K.,et al."Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China".Climate Dynamics 52.2020-01-02(2019).