Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China

doi:10.1007/s00382-018-4170-y

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China
	Wang, Weiqiang ; Xu, Kang ; Huang, Qing-Lan ; Tam, Chi-Yung ; Chen, Sheng ; Zhu, Congwen 3,4
刊名	CLIMATE DYNAMICS
	2019
卷号	52 期号:2019-01-02 页码:523
关键词	Eastern-Pacific El Nino Central-Pacific El Nino Southern China wintertime rainfall Anomalous anticyclone East Asian winter monsoon
ISSN号	0930-7575
DOI	10.1007/s00382-018-4170-y
英文摘要	The impacts of the eastern-Pacific (EP) and central-Pacific (CP) El Nino-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 Nino, 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 Nino 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 Nino, 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 Nino, 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 Nino-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 Nino should be considered carefully for understanding the El Nino-EAWM relationship.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17781]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
作者单位	1.Chinese Univ Hong Kong, Earth Syst Sci Programme, Hong Kong, Peoples R China 2.Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China 3.Jiangmen Meteorol Serv, Jiangmen, Peoples R China 4.Chinese Acad Meteorol Sci, State Key Lab Severe Weather LASW, Beijing, Peoples R China 5.Chinese Acad Meteorol Sci, Inst Climate Syst, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Weiqiang,Xu, Kang,Huang, Qing-Lan,et al. Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China[J]. CLIMATE DYNAMICS,2019,52(2019-01-02):523, 538.
APA	Wang, Weiqiang,Xu, Kang,Huang, Qing-Lan,Tam, Chi-Yung,Chen, Sheng,&Zhu, Congwen.(2019).Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China.CLIMATE DYNAMICS,52(2019-01-02),523.
MLA	Wang, Weiqiang,et al."Roles of tropical SST patterns during two types of ENSO in modulating wintertime rainfall over southern China".CLIMATE DYNAMICS 52.2019-01-02(2019):523.