气候变化领域集成服务门户(CCPortal): Control of Barents Sea Wintertime Cyclone Variability by Large-Scale Atmospheric Flow

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DOI	10.1029/2020GL090322
	Control of Barents Sea Wintertime Cyclone Variability by Large-Scale Atmospheric Flow
	Madonna E.; Hes G.; Li C.; Michel C.; Siew P.Y.F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Extratropical cyclones transport heat and moisture into the Arctic, which can promote surface warming and sea ice melt. We investigate wintertime cyclone variability in the Barents Sea region to understand what controls the impacts, frequency, and path of cyclones at high latitudes. Large-scale atmospheric conditions are found to be key, with the strongest surface warming from cyclones originating south of 60°N in the North Atlantic and steered northeastward by the upper-level flow. Atmospheric conditions also control cyclone variability in the Barents proper: Months with many cyclones are characterized by an absence of high-latitude blocking and enhanced local baroclinicity, due to the presence of strong upper-level winds and a southwest-northeast tilted jet stream more than changes in sea ice. This study confirms that Arctic cyclones exhibit large interannual variability, and accounting for this variability reveals that trends in Barents cyclone frequency are not robust over the 1979–2018 period. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ice control; Sea ice; Storms; Atmospheric conditions; Atmospheric flows; Cyclone frequency; Extratropical cyclones; High Latitudes; Interannual variability; North Atlantic; Surface warming; Atmospheric movements; atmospheric blocking; atmospheric dynamics; atmospheric moisture; baroclinic mode; cyclone; extratropical cyclone; global warming; heat transfer; jet stream; sea ice; winter; Arctic Ocean; Atlantic Ocean; Atlantic Ocean (North); Barents Sea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169668
作者单位	Geophysical Institute, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway; Départment de Géosciences, École Normale Supérieure, PSL Research University, Paris, France
推荐引用方式 GB/T 7714	Madonna E.,Hes G.,Li C.,et al. Control of Barents Sea Wintertime Cyclone Variability by Large-Scale Atmospheric Flow[J],2020,47(19).
APA	Madonna E.,Hes G.,Li C.,Michel C.,&Siew P.Y.F..(2020).Control of Barents Sea Wintertime Cyclone Variability by Large-Scale Atmospheric Flow.Geophysical Research Letters,47(19).
MLA	Madonna E.,et al."Control of Barents Sea Wintertime Cyclone Variability by Large-Scale Atmospheric Flow".Geophysical Research Letters 47.19(2020).