气候变化领域集成服务门户(CCPortal): Time-varying structure of the wintertime Eurasian pattern: role of the North Atlantic sea surface temperature and atmospheric mean flow

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DOI	10.1007/s00382-018-4261-9
	Time-varying structure of the wintertime Eurasian pattern: role of the North Atlantic sea surface temperature and atmospheric mean flow
	Wang L.; Liu Y.; Zhang Y.; Chen W.; Chen S.
发表日期	2019
ISSN	0930-7575
起始页码	2467
结束页码	2479
卷号	52 期号:2020-03-04
英文摘要	The Eurasian (EU) pattern was shown to be closely linked to the North Atlantic sea surface temperature (SST) in boreal winter, and this study suggest that such linkage varies with time and that the structure of the EU pattern also changes accordingly. During the period with strong EU-SST linkage (1961–1977 and 1993–2013, denoted as HIGH epoch), the EU pattern is a well-defined barotropic wave train stretching from the North Atlantic towards East Asia-western North Pacific, and it facilitates cooling and slight reduction of precipitation over East Asia and enhanced precipitation over Europe in its positive phase. During the period with weak EU-SST linkage (1948–1960 and 1978–1992, denoted as LOW epoch), in contrast, its centre over Northern Europe weakens sharply, and the wave-like structure of the EU pattern is not well established. In this case, its influences on precipitation over Europe almost vanish, but its influences on both the surface air temperature and precipitation over East Asia amplify significantly. The Atlantic centre of the EU pattern forms from different mechanism during the two epochs. It can be excited by the underlying North Atlantic SST via eddy-mediated processes during the HIGH epoch, while it is likely generated by an incoming Rossby wave train from upstream region during the LOW epoch. Nevertheless, its location and intensity remain similar during the two epochs. Numerical experiments with a barotropic model suggest that the contrasting structure of the EU pattern is mainly attributed to the changes of the atmospheric mean flow. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	barotropic motion; eddy; precipitation (climatology); Rossby wave; sea surface temperature; winter; Atlantic Ocean; Atlantic Ocean (North); Eurasia; Far East; Pacific Ocean; Pacific Ocean (North)
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/146528
作者单位	Center for Monsoon System Research and LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Joint Center for Global Change Studies, Beijing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu, China; School of Atmospheric Sciences, Nanjing University, Nanjing, China
推荐引用方式 GB/T 7714	Wang L.,Liu Y.,Zhang Y.,et al. Time-varying structure of the wintertime Eurasian pattern: role of the North Atlantic sea surface temperature and atmospheric mean flow[J],2019,52(2020-03-04).
APA	Wang L.,Liu Y.,Zhang Y.,Chen W.,&Chen S..(2019).Time-varying structure of the wintertime Eurasian pattern: role of the North Atlantic sea surface temperature and atmospheric mean flow.Climate Dynamics,52(2020-03-04).
MLA	Wang L.,et al."Time-varying structure of the wintertime Eurasian pattern: role of the North Atlantic sea surface temperature and atmospheric mean flow".Climate Dynamics 52.2020-03-04(2019).