Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter

doi:10.1175/JCLI-D-16-0548.1

IOCAS-IR > 海洋环流与波动重点实验室

	Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter
	Gong, Tingting 1; Luo, Dehai 2
	2017-04-01
发表期刊	JOURNAL OF CLIMATE
卷号	30 期号:7 页码:2639-2654
文章类型	Article
摘要	In this paper, the lead-lag relationship between the Arctic sea ice variability over the Barents-Kara Sea (BKS) and Ural blocking (UB) in winter (DJF) ranging from 1979/80 to 2011/12 is examined. It is found that in a regressed DJF-mean field an increased UB frequency (days) corresponds to an enhanced sea ice decline over the BKS, while the high sea surface temperature over the BKS is accompanied by a significant Arctic sea ice reduction. Lagged daily regression and correlation reveal that the growth and maintenance of the UB that is related to the positive North Atlantic Oscillation (NAO(+)) through the negative east Atlantic/west Russia (EA/WR-) wave train is accompanied by an intensified negative BKS sea ice anomaly, and the BKS sea ice reduction lags the UB pattern by about four days. Because the intensified UB pattern occurs together with enhanced downward infrared radiation (IR) associated with the intensified moisture flux convergence and total column water over the BKS, the UB pattern contributes significantly to the BKS sea ice decrease on a time scale of weeks through intensified positive surface air temperature (SAT) anomalies resulting from enhanced downward IR. It is also found that the BKS sea ice decline can persistently maintain even when the UB has disappeared, thus indicating that the UB pattern is an important amplifier of the BKS sea ice reduction. Moreover, it is demonstrated that the EA/WR wave train formed by the combined NAO(+) and UB patterns is closely related to the amplified warming over the BKS through the strengthening (weakening) of mid-to-high-latitude westerly wind in the North Atlantic (Eurasia).
DOI	10.1175/JCLI-D-16-0548.1
收录类别	SCI
语种	英语
WOS记录号	WOS:000399678400020
引用统计	被引频次：88[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.qdio.ac.cn/handle/337002/137064
专题	海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanog, Qingdao, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Reg Climate Environm Temperate East A, Inst Atmospher Phys, Beijing, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Gong, Tingting,Luo, Dehai. Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter[J]. JOURNAL OF CLIMATE,2017,30(7):2639-2654.
APA	Gong, Tingting,&Luo, Dehai.(2017).Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter.JOURNAL OF CLIMATE,30(7),2639-2654.
MLA	Gong, Tingting,et al."Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter".JOURNAL OF CLIMATE 30.7(2017):2639-2654.

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