Response of the North Pacific Storm Track Activity in the Cold Season to Multi-scale Oceanic Variations of Kuroshio Extension System: A Statistical Assessment  

作　　者：Peilong YU Minghao YANG Chao ZHANG Yi LI Lifeng ZHANG Shiyao CHEN 

机构地区：[1]Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster,Ministry of Education/Joint International Research Laboratory of Climate and Environment Change,Nanjing University of Information Science and Technology,Nanjing 210044,China [2]College of Meteorology and Oceanography,National University of Defense Technology,Changsha 410073,China

出　　处：《Advances in Atmospheric Sciences》2023年第3期514-530,共17页大气科学进展（英文版）

基　　金：jointly supported by the National Natural Science Foundation of China (Grant Nos. 42105066, 42088101, 41975066);supported by the China Postdoctoral Science Foundation (2021M701754);the Postdoctoral Research Funding of Jiangsu Province (2021K052A);the Research Project of the National University of Defense Technology (ZK20-45)

摘　　要：In this paper,a statistical method called Generalized Equilibrium Feedback Analysis(GEFA)is used to investigate the responses of the North Pacific Storm Track(NPST)in the cold season to the multi-scale oceanic variations of the Kuroshio Extension(KE)system,including its large-scale variation,oceanic front meridional shift,and mesoscale eddy activity.Results show that in the cold season from the lower to the upper troposphere,the KE large-scale variation significantly weakens the storm track activity over the central North Pacific south of 30°N.The northward shift of the KE front significantly strengthens the storm track activity over the western and central North Pacific south of 40°N,resulting in a southward shift of the NPST.In contrast,the NPST response to KE mesoscale eddy activity is not so significant and relatively shallow,which only shows some significant positive signals near the dateline in the lower and middle troposphere.Furthermore,it is found that baroclinicity and baroclinic energy conversion play an important role in the formation of the NPST response to the KE multi-scale oceanic variations.

关 键 词：generalized equilibrium feedback analysis Kuroshio Extension multi-scale oceanic variations North Pacific storm track 

分 类 号：P732[天文地球—海洋科学]