气候变化领域集成服务门户(CCPortal): Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter

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DOI	10.1007/s00382-020-05191-9
	Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter
	Kim J.; Kim K.-Y.
发表日期	2020
ISSN	0930-7575
起始页码	3599
结束页码	3611
卷号	54
英文摘要	The leading two modes of winter (November–February) Arctic sea ice cover variability and their linkage to stratospheric polar vortex variations are analyzed based on the cyclostationary EOF techniques. The first mode represents an accelerating trend of Arctic sea ice decline associated with Arctic amplification, particularly in the Barents and Kara Seas. The second mode is associated with decadal-scale phase shifts of dipole sea ice anomalies in the North Atlantic caused by NAO circulation. The first two modes of sea ice variability represent respectively a forced climate change and internal variability, and result in temporally and spatially distinct stratospheric polar vortex weakening. Sea ice reduction in the Barents and Kara Seas for the first mode is linked to a stratospheric vortex weakening during mid January–late February. The second mode with the dipole structure of positive sea ice anomalies in the Barents and Greenland Seas and negative anomalies in the Hudson Bay and Labrador Sea is related to a stratospheric vortex weakening during December–early February. The spatial evolutionary structure of anomalous polar vortex also exhibits differences between the two modes. When stratospheric anomalies are fully developed, stratospheric vortex is shifted to Eurasia in the first mode and to Europe in the second mode. © 2020, The Author(s).
语种	英语
scopus关键词	decadal variation; North Atlantic Oscillation; polar vortex; sea ice; spatial variation; stratosphere; winter; Arctic Ocean; Atlantic Ocean; Barents Sea; Canada; Hudson Bay; Kara Sea; Labrador 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/145520
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, South Korea
推荐引用方式 GB/T 7714	Kim J.,Kim K.-Y.. Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter[J],2020,54.
APA	Kim J.,&Kim K.-Y..(2020).Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter.Climate Dynamics,54.
MLA	Kim J.,et al."Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter".Climate Dynamics 54(2020).