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

CORC > 海洋研究所 > 中国科学院海洋研究所 > 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 4; Yao, Yao 1,2,3; Luo, Dehai 2,3; Li, Yuanlong 4
刊名	ATMOSPHERIC RESEARCH
	2023-11-01
卷号	295 页码:8
关键词	Arctic Sea ice Polar vortex Ural blocking Eurasian cold anomalies Positive feedback
ISSN号	0169-8095
DOI	10.1016/j.atmosres.2023.107038
通讯作者	Yao, Yao(yaoyao@tea.ac.cn)
英文摘要	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.
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关键词	STRATOSPHERIC PATHWAY ; ATMOSPHERIC BLOCKING ; MIDLATITUDE CIRCULATION ; VARIABILITY ; CLIMATE ; IMPACTS ; EVENTS ; TRENDS ; JANUARY ; LINKING
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:001088539300001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/181601]
专题	海洋研究所_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, Inst Atmospher Phys, 81 Beichen West Rd, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Reg Climate Environm Temperate East Asia, Inst Atmospher Phys, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China
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.