气候变化领域集成服务门户(CCPortal): Effect of warm SST in the subtropical eastern north pacific on triggering the abrupt change of the Mei-Yu rainfall over South China in the early 1990s

CCPortal

DOI	10.1175/JCLI-D-18-0292.1
	Effect of warm SST in the subtropical eastern north pacific on triggering the abrupt change of the Mei-Yu rainfall over South China in the early 1990s
	Wu Y.-K.; Huang A.-Y.; Wu C.-K.; Hong C.-C.; Chang C.-C.
发表日期	2020
ISSN	0894-8755
起始页码	657
结束页码	673
卷号	33 期号:2
英文摘要	In the early 1990s, the mei-yu rainfall over South China in early boreal summer exhibited an abrupt change and northward extension. This change altered the pattern of East Asian summer rainfall from a dipole-like to a monopole-like pattern; that is, the out-of-phase relationship between the rainfall in the south and that in the north of the Yangtze and Huaihe River valley changed to an in-phase relationship. The physical processes potentially responsible for triggering this abrupt change were analyzed in this study. Our observations revealed that the western North Pacific subtropical high (WNPSH), sea surface temperature (SST) in the subtropical eastern North Pacific (SENP), and the mei-yu rainfall in South China exhibited an abrupt increase in the early 1990s, suggesting that these factors are correlated. From the observations and results of numerical experiments, we proposed that the abrupt SST warming in the SENP in the early 1990s generated an east-west overturning circulation anomaly in the Pacific Ocean and that the anomalous downward motion in the western North Pacific consequently triggered the abrupt increase and westward extension of the WNPSH in the early 1990s. The enhanced and westward extension of WNPSH created a low-level southeasterly anomaly that transported considerable humid and warm air into East Asia and sequentially triggered the abrupt increase of mei-yu rainfall in the South China in the early 1990s. © 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Rain; Surface waters; Tropics; Eastern north pacific; Numerical experiments; Overturning circulation; Pacific ocean; Physical process; Sea surface temperature (SST); Summer rainfall; Western North Pacific; Oceanography; air-sea interaction; climate effect; humid environment; numerical model; oceanic circulation; overturn; rainfall; sea surface temperature; Pacific Ocean; Pacific Ocean (North); South China Sea; Citrus maxima
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171489
作者单位	Department of Earth and Life Sciences, University of Taipei, Taipei, Taiwan; Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan; National Science and Technology Center for Disaster Reduction, Taipei, Taiwan
推荐引用方式 GB/T 7714	Wu Y.-K.,Huang A.-Y.,Wu C.-K.,et al. Effect of warm SST in the subtropical eastern north pacific on triggering the abrupt change of the Mei-Yu rainfall over South China in the early 1990s[J],2020,33(2).
APA	Wu Y.-K.,Huang A.-Y.,Wu C.-K.,Hong C.-C.,&Chang C.-C..(2020).Effect of warm SST in the subtropical eastern north pacific on triggering the abrupt change of the Mei-Yu rainfall over South China in the early 1990s.Journal of Climate,33(2).
MLA	Wu Y.-K.,et al."Effect of warm SST in the subtropical eastern north pacific on triggering the abrupt change of the Mei-Yu rainfall over South China in the early 1990s".Journal of Climate 33.2(2020).