气候变化领域集成服务门户(CCPortal): Dominant wintertime surface air temperature modes in the Northern Hemisphere extratropics

CCPortal

DOI	10.1007/s00382-020-05478-x
	Dominant wintertime surface air temperature modes in the Northern Hemisphere extratropics
	Park H.-L.; Seo K.-H.; Kim B.-M.; Kim J.-Y.; Wang S.-Y.S.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-03-04
英文摘要	Recent observations showed that boreal winter exhibits significant cooling events in the Eurasian and North American continents despite the global warming trend. To better understand the boreal winter surface air temperature (SAT) variability and its physical characteristics, we investigated the three distinct Empirical Orthogonal Function (EOF) modes of the extratropical 2-m air temperature (T2m) variation and found that each mode can be related to the well-known physical processes: The first mode is characterized by the coherent change of wintertime SAT anomalies over northern Eurasia and central-eastern North America and it is found that snow cover variation in the Eurasian region can modulate Arctic Oscillation (AO) circulation through the troposphere–stratosphere interaction, which can affect wintertime SAT in the two continents. The second leading mode shows warm anomalies over the North Pacific especially around the Bering Strait and cold anomalies over most of Canada and the central part of North America. Associated with this mode, La Niña-like sea surface temperature (SST) anomaly can modulate the North American SAT variability through the generation of the tropospheric Pacific–North American (PNA) teleconnection pattern. The third mode represents warm anomalies over the Barents and Kara (B–K) seas and cold anomalies over East Asia. Sea ice loss over the B–K sea is analyzed to be closely related to the SAT variability over the East Asian region. © 2021, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Dominant mode; Extratropical 2-m air temperature; Rossby wave; Teleconnection; Winter climate
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183407
作者单位	Division of Earth Environmental System, Department of Atmospheric Sciences, Pusan National University, Busan, 46241, South Korea; Research Center of Climate Sciences, Pusan National University, Busan, South Korea; Department of Environmental Atmospheric Sciences, Pukyong National University, Yongso-ro 45, Nam-Gu, Busan, South Korea; Department of Plants, Soils and Climate, Utah State University, Logan, UT, United States
推荐引用方式 GB/T 7714	Park H.-L.,Seo K.-H.,Kim B.-M.,et al. Dominant wintertime surface air temperature modes in the Northern Hemisphere extratropics[J],2021,56(2021-03-04).
APA	Park H.-L.,Seo K.-H.,Kim B.-M.,Kim J.-Y.,&Wang S.-Y.S..(2021).Dominant wintertime surface air temperature modes in the Northern Hemisphere extratropics.Climate Dynamics,56(2021-03-04).
MLA	Park H.-L.,et al."Dominant wintertime surface air temperature modes in the Northern Hemisphere extratropics".Climate Dynamics 56.2021-03-04(2021).