气候变化领域集成服务门户(CCPortal): Strengthened linkage between midlatitudes and Arctic in boreal winter

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DOI	10.1007/s00382-019-04764-7
	Strengthened linkage between midlatitudes and Arctic in boreal winter
	Xu X.; He S.; Gao Y.; Furevik T.; Wang H.; Li F.; Ogawa F.
发表日期	2019
ISSN	0930-7575
起始页码	3971
结束页码	3983
卷号	53 期号:2020-07-08
英文摘要	Early studies have suggested a linkage between the surface warming over the Barents-Kara Seas and the strength of the Siberian high in boreal winter. Here, we show that the linkage is not stable, and with an apparent interdecadal change in the late-1990s. Coinciding with Arctic surface warm anomalies in recent decades (1997–2017), the Siberian high has been significantly intensified, the East Asian jet stream has expanded westward, and an apparent Rossby wave has propagated from the Arctic to East Asia, suggesting an atmospheric teleconnection between midlatitudes and Arctic. In contrast, midlatitude atmospheric circulation anomalies coinciding with Arctic surface warm anomalies were barely statistically significant during 1979–1996. The associated strong anomalous ascending/descending motions and divergent/convergent upper troposphere air masses over the Arctic-Eurasian sector seem to have favored the midlatitude-Arctic linkage during 1997–2017. We further hypothesize that Arctic mid-tropospheric warming plays a crucial role for the linkage between midlatitudes and Arctic in boreal winter. Multi-model simulations support this, and also point to internal atmospheric variability as the cause for the interdecadal shift in the strength of the midlatitude-Arctic linkage. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Arctic warming; Interdecadal change; Internal variability; Linkage; Siberian high
语种	英语
scopus关键词	air-sea interaction; atmospheric circulation; decadal variation; jet stream; midlatitude environment; Rossby wave; teleconnection; warming; winter; Arctic; Arctic Ocean; Barents Sea; Kara 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/145999
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, 5007, Norway; Nansen Environmental and Remote Sensing Center and Bjerknes Centre for Climate Research, Bergen, 5006, Norway; Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Climate Change Research Center, Chinese Academy of Sciences, Beijing, 100029, China; NILU‐Norwegian Institute for Air Research, Kjeller, 2007, Norway
推荐引用方式 GB/T 7714	Xu X.,He S.,Gao Y.,et al. Strengthened linkage between midlatitudes and Arctic in boreal winter[J],2019,53(2020-07-08).
APA	Xu X..,He S..,Gao Y..,Furevik T..,Wang H..,...&Ogawa F..(2019).Strengthened linkage between midlatitudes and Arctic in boreal winter.Climate Dynamics,53(2020-07-08).
MLA	Xu X.,et al."Strengthened linkage between midlatitudes and Arctic in boreal winter".Climate Dynamics 53.2020-07-08(2019).