Frequent central Pacific La Nina events may accelerate Arctic warming since the 1980s

查看全文 作　　者：Jing [1,2]Li;Lin [1,2,3]Mu;Linhao [4]Zhong 机构地区：[1]College of Life Sciences and Oceanography,Shenzhen University,Shenzhen 518060,China;[2]College of Marine Science and Technology,China University of Geosciences,Wuhan 430074,China;[3]Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China;[4]CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 出　　处：《Acta Oceanologica Sinica》索引2021年第40卷第11期,共8页 基　　金：The Shenzhen Fundamental Research Program under contract No.JCYJ20200109110220482;the National Natural Science Foundation of China under contract No.U2006210;the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)under contract No.GML2019ZD0604。 摘　　要：Including significant warming trend,Arctic climate changes also exhibit strong interannual variations in various fields,which is suggested to be related to El Nino and Southern Oscillation(ENSO)events.Previous studies have demonstrated the different impacts on the Arctic of central Pacific(CP)and eastern Pacific(EP)ENSO events,and suggested these impacts are largely of opposite sign for ENSO warm and cold phases.Our results illustrate asymmetrical changes for the cold and warm ENSO events,especially for the La Nina events.Compared to the past frequent basin-wide cooling La Nina events,since the 1980 s the cooling center for the La Nina event has strengthened and moved westward along with the increasing frequency for the canonical and CP La Nina events.Contrary to the basin-wide cooling and canonical La Nina events,the frequent CP La Nina events induce significant warming from the Beaufort Sea to Greenland via the convection center moving northward over the western Pacific.Observation analysis and numerical experiments both suggest that the changes in La Nina type may also accelerate Arctic warming. 关 键 词：ENSO diversity La Nina type the Arctic warming