气候变化领域集成服务门户(CCPortal): An observational estimate of the direct response of the cold-season atmospheric circulation to the arctic sea ice loss

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DOI	10.1175/JCLI-D-19-0687.1
	An observational estimate of the direct response of the cold-season atmospheric circulation to the arctic sea ice loss
	Simon A.; Frankignoul C.; Gastineau G.; Kwon Y.-O.
发表日期	2020
ISSN	0894-8755
起始页码	3863
结束页码	3882
卷号	33 期号:9
英文摘要	The direct response of the cold-season atmospheric circulation to the Arctic sea ice loss is estimated from observed sea ice concentration (SIC) and an atmospheric reanalysis, assuming that the atmospheric response to the long-term sea ice loss is the same as that to interannual pan-Arctic SIC fluctuations with identical spatial patterns. No large-scale relationship with previous interannual SIC fluctuations is found in October and November, but a negative North Atlantic Oscillation (NAO)/Arctic Oscillation follows the pan-Arctic SIC fluctuations from December to March. The signal is field significant in the stratosphere in December, and in the troposphere and tropopause thereafter. However, multiple regressions indicate that the stratospheric December signal is largely due to concomitant Siberian snow-cover anomalies. On the other hand, the tropospheric January-March NAO signals can be unambiguously attributed to SIC variability, with an Iceland high approaching 45 m at 500 hPa, a 28C surface air warming in northeastern Canada, and a modulation of blocking activity in the North Atlantic sector. In March, a 18C northern Europe cooling is also attributed to SIC. An SIC impact on the warm Arctic-cold Eurasia pattern is only found in February in relation to January SIC. Extrapolating the most robust results suggests that, in the absence of other forcings, the SIC loss between 1979 and 2016 would have induced a 28-38C decade21 winter warming in northeastern North America and a 40-60 m decade21 increase in the height of the Iceland high, if linearity and perpetual winter conditions could be assumed. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric pressure; Climatology; Snow; Troposphere; Atmospheric circulation; Atmospheric reanalysis; Atmospheric response; Multiple regressions; North Atlantic oscillations; Scale relationship; Sea ice concentration; Winter conditions; Sea ice; annual variation; atmospheric circulation; climate change; North Atlantic Oscillation; sea ice; spatial distribution; winter; Atlantic Ocean; Atlantic Ocean (North)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171340
作者单位	Sorbonne Université, IRD/MNHN/CNRS, LOCEAN, Paris, France; Woods Hole Oceanographic Institution, Woods Hole, MA, United States
推荐引用方式 GB/T 7714	Simon A.,Frankignoul C.,Gastineau G.,et al. An observational estimate of the direct response of the cold-season atmospheric circulation to the arctic sea ice loss[J],2020,33(9).
APA	Simon A.,Frankignoul C.,Gastineau G.,&Kwon Y.-O..(2020).An observational estimate of the direct response of the cold-season atmospheric circulation to the arctic sea ice loss.Journal of Climate,33(9).
MLA	Simon A.,et al."An observational estimate of the direct response of the cold-season atmospheric circulation to the arctic sea ice loss".Journal of Climate 33.9(2020).