气候变化领域集成服务门户(CCPortal): Enhanced impact of Arctic sea ice change during boreal autumn on the following spring Arctic oscillation since the mid-1990s

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DOI	10.1007/s00382-019-04886-y
	Enhanced impact of Arctic sea ice change during boreal autumn on the following spring Arctic oscillation since the mid-1990s
	Chen S.; Wu R.; Chen W.
发表日期	2019
ISSN	0930-7575
起始页码	5607
结束页码	5621
卷号	53 期号:2020-09-10
英文摘要	Previous study indicated that changes in the Arctic sea ice concentration (ASIC) during boreal autumn in the Laptev-eastern Siberian-Beaufort Seas have a marked influence on the interannual variation of Arctic oscillation (AO) during following spring. This study reveals a pronounced enhancement of the linkage between autumn ASIC changes and following spring AO since the mid-1990s. The correlation coefficient between the autumn ASIC and spring AO index reaches 0.72 during 1998–2014. During this period, autumn ASIC decrease results in pronounced tropospheric warming over the high latitudes and a reduction of meridional temperature gradient. This leads to decrease in circumpolar westerly winds and increase in the upward propagation of quasi-stationary wave, which weakens stratospheric polar vortex. Then, spring AO becomes weaker than normal via the interaction between stationary wave and mean flow and the accompanying downward propagation of anomalous easterly winds. Before the mid-1990s, however, decrease in the autumn ASIC is not followed by an obvious change in the overlying air temperature. Accordingly, circumpolar westerly winds and polar vortex experience weak changes. Thus, the linkage between the autumn ASIC and following spring AO is weak. It is suggested that interdecadal change in the impact of autumn ASIC on the spring AO is attributed to a change in the interannual variability of autumn ASIC. Specifically, interannual variability of autumn ASIC is much larger after the mid-1990s, which contributes to stronger stratospheric response and ASIC-spring AO connection. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Arctic sea ice; Interdecadal change; Spring AO; Stratospheric process
语种	英语
scopus关键词	air-sea interaction; annual variation; Arctic Oscillation; autumn; ice cover; polar vortex; sea ice; spring (season); stratosphere; temperature gradient; troposphere; warming; westerly; Arctic Ocean; Beaufort Sea; Laptev Sea; Siberia
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/145907
作者单位	Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; School of Earth Sciences, Zhejiang University, Hangzhou, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Chen S.,Wu R.,Chen W.. Enhanced impact of Arctic sea ice change during boreal autumn on the following spring Arctic oscillation since the mid-1990s[J],2019,53(2020-09-10).
APA	Chen S.,Wu R.,&Chen W..(2019).Enhanced impact of Arctic sea ice change during boreal autumn on the following spring Arctic oscillation since the mid-1990s.Climate Dynamics,53(2020-09-10).
MLA	Chen S.,et al."Enhanced impact of Arctic sea ice change during boreal autumn on the following spring Arctic oscillation since the mid-1990s".Climate Dynamics 53.2020-09-10(2019).