气候变化领域集成服务门户(CCPortal): The strengthened relationship between the Yangtze River Valley summer rainfall and the Southern Hemisphere annular mode in recent decades

CCPortal

DOI	10.1007/s00382-019-05078-4
	The strengthened relationship between the Yangtze River Valley summer rainfall and the Southern Hemisphere annular mode in recent decades
	Dou J.; Wu Z.; Li J.
发表日期	2020
ISSN	0930-7575
起始页码	1607
结束页码	1624
卷号	54
英文摘要	This paper reveals a change in the relationship between the Yangtze River valley (YRV) summer rainfall (YRVSR) and the spring Southern Hemisphere annular mode (SAM) during the period of 1958–2012. It is found that the positive correlation between the YRVSR and the previous May SAM is insignificant during the period of 1958–1987 (P1), while it becomes significant during the period of 1988–2012 (P2). Such interdecadal change is relevant to the interdecadal change of the relationship between the May SAM and the Indian Ocean sea surface temperature anomaly (SSTA). During P2, the strong exchange of the air-sea heat flux related to the May SAM can excite a prominent meridional Indian Ocean tri-pole (IOT) SSTA pattern, whereas during P1, the May SAM associated air-sea heat exchange is weak and the IOT SSTA is not evident. Further observational and simulated evidences show that the May SAM associated IOT SSTA can persist through the following boreal summer and modulate the rainfall anomalies over the Maritime Continent (MC) by changing the zonal circulation over the tropical Indian Ocean-MC region. Subsequently, wave energies generated by the latent heat release of the MC rainfall (MCR) anomalies can propagate northward to the YRV along the great circle route. Responding to the positive (or negative) MCR heating forcing, anticyclonic (or cyclonic) circulation anomalies are excited over the western North Pacific, transporting more (or less) moisture to the YRV. Correspondingly, abnormal ascending (or sinking) motions are induced over the YRV, favoring sufficient (or insufficient) YRVSR. Thus, the IOT SSTA and MCR act as the “ocean” and “atmosphere” bridge role in connecting the May SAM and the YRVSR, respectively. Those models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) which well capture the May SAM-YRVSR relation can reproduce the IOT SSTA pattern and MCR anomalies associated with the May SAM. This further affirms that both the IOT SSTA and MCR are responsible for the strengthened relationship between the SAM and the YRVSR. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Interdecadal change; SAM; Yangtze River valley summer rainfall
语种	英语
scopus关键词	air-sea interaction; CMIP; correlation; decadal variation; heat flux; rainfall; sea surface temperature; Southern Hemisphere; spring (season); summer; temperature anomaly; valley; China; Indian Ocean; Indian Ocean (Tropical); Pacific Ocean; Pacific Ocean (North); Yangtze Valley
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/145616
作者单位	Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; Key Laboratory of Physical Oceanography, Institute for Advanced Ocean Studies, Ocean University of China and Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266003, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266003, China
推荐引用方式 GB/T 7714	Dou J.,Wu Z.,Li J.. The strengthened relationship between the Yangtze River Valley summer rainfall and the Southern Hemisphere annular mode in recent decades[J],2020,54.
APA	Dou J.,Wu Z.,&Li J..(2020).The strengthened relationship between the Yangtze River Valley summer rainfall and the Southern Hemisphere annular mode in recent decades.Climate Dynamics,54.
MLA	Dou J.,et al."The strengthened relationship between the Yangtze River Valley summer rainfall and the Southern Hemisphere annular mode in recent decades".Climate Dynamics 54(2020).