Loss of autumn Kara-East Siberian Sea ice intensifies winter Ural blocking and cold anomalies in high latitudes of Eurasia

doi:10.1016/j.atmosres.2023.107038

IOCAS-IR > 海洋环流与波动重点实验室

	Loss of autumn Kara-East Siberian Sea ice intensifies winter Ural blocking and cold anomalies in high latitudes of Eurasia
	Song, Yuanyuan 1; Yao, Yao 2,3,4; Luo, Dehai 2,3; Li, Yuanlong 1
	2023-11-01
发表期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
卷号	295 页码:8
通讯作者	Yao, Yao(yaoyao@tea.ac.cn)
摘要	Sea ice in the Kara-East Siberian Sea (KESS) declined to the lowest record in the autumn of 2020 and has been suggested to affect the Eurasian climate in the following winter. By analyzing reanalysis data from 1979 to 2021 and performing model experiments, this study demonstrates that the loss of autumn KESS sea ice acts to intensify the Eurasian cold spells in winter. Low autumn KESS sea ice attenuates the stratospheric polar vortex through driving upward planetary wave activities. The weakening of polar vortex persists to winter and induces anomalies in tropospheric zonal wind and meridional gradient of potential vorticity through downward wave propagation. These intraseasonal to cross-seasonal processes lead to enhancement and prolonged duration of Ural blocking that aggravates Eurasian cold spells. A positive feedback likely exists between the weak stratospheric polar vortex induced by autumn sea ice loss and the wintertime Ural blocking via vertical wave propagation. The results establish a link between autumn KESS sea ice and Eurasian winter climate, with implications for seasonal prediction of Eurasian cold events.
关键词	Arctic Sea ice Polar vortex Ural blocking Eurasian cold anomalies Positive feedback
DOI	10.1016/j.atmosres.2023.107038
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42375061] ; National Natural Science Foundation of China[41975068] ; National Natural Science Foundation of China[42150204] ; National Natural Science Foundation of China[42288101] ; National Key Scientific and Technological Infrastructure project Earth System Numerical Simulation Facility (EarthLab)
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001088539300001
出版者	ELSEVIER SCIENCE INC
WOS关键词	STRATOSPHERIC PATHWAY ; ATMOSPHERIC BLOCKING ; MIDLATITUDE CIRCULATION ; VARIABILITY ; CLIMATE ; IMPACTS ; EVENTS ; TRENDS ; JANUARY ; LINKING
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181602
专题	海洋环流与波动重点实验室
通讯作者	Yao, Yao
作者单位	1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Key Lab Reg Climate Environm Temperate East Asia, Inst Atmospher Phys, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Atmospher Phys, 81 Beichen West Rd, Beijing 100029, Peoples R China
第一作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Song, Yuanyuan,Yao, Yao,Luo, Dehai,et al. Loss of autumn Kara-East Siberian Sea ice intensifies winter Ural blocking and cold anomalies in high latitudes of Eurasia[J]. ATMOSPHERIC RESEARCH,2023,295:8.
APA	Song, Yuanyuan,Yao, Yao,Luo, Dehai,&Li, Yuanlong.(2023).Loss of autumn Kara-East Siberian Sea ice intensifies winter Ural blocking and cold anomalies in high latitudes of Eurasia.ATMOSPHERIC RESEARCH,295,8.
MLA	Song, Yuanyuan,et al."Loss of autumn Kara-East Siberian Sea ice intensifies winter Ural blocking and cold anomalies in high latitudes of Eurasia".ATMOSPHERIC RESEARCH 295(2023):8.

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