Cold Air Outbreaks in Winter over the Continental United States and Its Possible Linkage with Arctic Sea Ice Loss

doi:10.3390/atmos15010063

IOCAS-IR > 海洋环流与波动重点实验室

	Cold Air Outbreaks in Winter over the Continental United States and Its Possible Linkage with Arctic Sea Ice Loss
	Wang, Yanshuo 1,2; Yang, Yuxing 3,4; Huang, Fei 1,2; Ding, Shuoyi ; Chen, Xiaodan ; Xu, Peiqiang
	2024
发表期刊	ATMOSPHERE
卷号	15 期号:1 页码:14
通讯作者	Huang, Fei([email protected])
摘要	The mechanism for the paradox of global warming and successive cold winters in mid-latitudes remains controversial. In this study, the connection between Arctic sea ice (ASI) loss and frequent cold air outbreaks in eastern Continental United States (CONUS) is explored. Two distinct periods of high and low ASI (hereafter high- and low-ice phases) are identified for comparative study. It is demonstrated that cold air outbreaks occur more frequently during the low-ice phase compared to that during the high-ice phase. The polar vortex is weakened and shifted southward during the low-ice phase. Correspondingly, the spatial pattern of 500 hPa geopotential height (GPH), which represents the mid-tropospheric circulation, shows a clear negative Arctic Oscillation-like pattern in the low-ice phase. Specifically, positive GPH anomalies in the Arctic region with two centers, respectively located over Greenland and the Barents Sea, significantly weaken the low-pressure system centered around the Baffin Island, and enhance Ural blocking in the low-ice phase. Meanwhile, the high ridge extending from Alaska to the west coast of North America further intensifies, while the low trough over eastern CONUS deepens. As a result, the atmospheric circulation in North America becomes more conductive to frigid Arctic air outbreaks. It is concluded that the ASI loss contributes to more cold air outbreaks in winter in eastern CONUS through the polar vortex weakening with southward displacement of the polar vortex edge, which lead to the weakening of the meridional potential vorticity gradient between the Arctic and mid-latitude and thus are conducive to the strengthening and long-term maintenance of the blocking high.
关键词	Arctic sea ice loss cold air outbreaks in eastern CONUS polar vortex weakened potential vorticity gradient
DOI	10.3390/atmos15010063
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001149058100001
出版者	MDPI
WOS关键词	AMPLIFICATION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184354
专题	海洋环流与波动重点实验室
通讯作者	Huang, Fei
作者单位	1.Ocean Univ China, Frontier Sci Ctr Deep Ocean Multispheres & Earth S, Qingdao 266100, Peoples R China 2.Ocean Univ China, Key Lab Phys Oceanog, Qingdao 266100, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 4.Laoshan Lab, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yanshuo,Yang, Yuxing,Huang, Fei,et al. Cold Air Outbreaks in Winter over the Continental United States and Its Possible Linkage with Arctic Sea Ice Loss[J]. ATMOSPHERE,2024,15(1):14.
APA	Wang, Yanshuo,Yang, Yuxing,Huang, Fei,Ding, Shuoyi,Chen, Xiaodan,&Xu, Peiqiang.(2024).Cold Air Outbreaks in Winter over the Continental United States and Its Possible Linkage with Arctic Sea Ice Loss.ATMOSPHERE,15(1),14.
MLA	Wang, Yanshuo,et al."Cold Air Outbreaks in Winter over the Continental United States and Its Possible Linkage with Arctic Sea Ice Loss".ATMOSPHERE 15.1(2024):14.