Extreme Cold Events from East Asia to North America in Winter 2020/21:Comparisons,Causes,and Future Implications

作     者：Xiangdong ZHANG Yunfei FU Zhe HAN James E.OVERLAND Annette RINKE Han TANG Timo VIHMA Muyin WANG Xiangdong ZHANG;Yunfei FU;Zhe HAN;James E.OVERLAND;Annette RINKE;Han TANG;Timo VIHMA;Muyin WANG

作者机构：Univeristy of Alaska FairbanksFairbanksAK 99775USA University of Science and Technology of ChinaHefei 230026China Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China NOAA/Pacific Marine Environmental LaboratorySeattleWA 98115USA Alfred Wegener InstituteHelmholtz Center for Polar and Marine Research14401 PotsdamGermany Finnish Meteorological InstituteFI-00101 HelsinkiFinland University of WashingtonSeattleWA 98105USA 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2022年第39卷第4期

页      面：553-565页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported by the U.S. Department of Energy (Grant No. DE-SC0020640) the National Natural Science Foundation of China (Grant Nos. 41675041 and 41790475) the Arctic Research Program of the NOAA Global Ocean Monitoring and Observing Office the Deutsche Forschungsgemeinschaft (project 268020496 TRR 172 within the Transregional Collaborative Research Center “Arcti C Amplification:Climate Relevant Atmospheric and Surfa Ce Processes and Feedback Mechanisms (AC)3”) the Academy of Finland (contract 317999) the Cooperative Institute for Climate Ocean &Ecosystem Studies (CIOCES) under NOAA Cooperative Agreement NA20OAR4320271 

主　　题：extreme weather events sea surface temperature Arctic sea ice Arctic amplification sudden stratospheric warming stratospheric polar vortex 

摘      要：Three striking and impactful extreme cold weather events successively occurred across East Asia and North America during the mid-winter of 2020/*** events open a new window to detect possible underlying physical *** analysis here indicates that the occurrences of the three events resulted from integrated effects of a concurrence of anomalous thermal conditions in three oceans and interactive Arctic-lower latitude atmospheric circulation processes,which were linked and influenced by one major sudden stratospheric warming(SSW).The North Atlantic warm blob initiated an increased poleward transient eddy heat flux,reducing the Barents-Kara seas sea ice over a warmed ocean and disrupting the stratospheric polar vortex(SPV)to induce the major *** Rossby wave trains excited by the North Atlantic warm blob and the tropical Pacific La Nina interacted with the Arctic tropospheric circulation anomalies or the tropospheric polar vortex to provide dynamic settings,steering cold polar air *** long memory of the retreated sea ice with the underlying warm ocean and the amplified tropospheric blocking highs from the midlatitudes to the Arctic intermittently fueled the increased transient eddy heat flux to sustain the SSW over a long time *** displaced or split SPV centers associated with the SSW played crucial roles in substantially intensifying the tropospheric circulation anomalies and moving the jet stream to the far south to cause cold air outbreaks to a rarely observed extreme *** results have significant implications for increasing prediction skill and improving policy decision making to enhance resilience in“One Health,One Future.