Impacts of Polar Vortex,NPO,and SST Configurations on Unusually Cool Summers in Northeast China.Part I:Analysis and Diagnosis  

作　　者：廉毅 沈柏竹 李尚锋 赵滨 高枞亭 刘刚 刘平 曹玲 

机构地区：[1]Laboratory of Research for Middle-High Latitude Circulation Systems and East Asian Monsoon [2]Institute of Meteorological Sciences of Jilin Province [3]National Meteorological Center [4]Jilin Meteorological Science and Technology Service Center [5]Center of Weather Film in Jilin Province

出　　处：《Advances in Atmospheric Sciences》2013年第1期193-209,共17页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 41175083 and 41275096);the Special Fund for Meteorological Scientific Research in the Public Interest (Grant Nos. GYHY201006020,GYHY201106016,and GYHY201106015)

摘　　要：This study unveils the evolution of two major early signals in the North Pacific atmosphere-ocean system that heralded abnormal high-pressure blockings and cold-vortex activities across Northeast China, based on an analysis of the configurations of major modes including the polar vortex, the North Pacific Oscillation （NPO）, and SST in the preceding winter and spring and atmospheric low-frequency disturbances in Northeast China. We analyzed these aspects to understand the atmosphere ocean physical coupling processes characterized by the two early signals, and here we explain the possible mechanisms through which dipole circulation anomalies affect the summer low-temperature processes in Northeast China. We further analyzed the interdecadal variation background and associated physical processes of the two early signals.This study unveils the evolution of two major early signals in the North Pacific atmosphere-ocean system that heralded abnormal high-pressure blockings and cold-vortex activities across Northeast China, based on an analysis of the configurations of major modes including the polar vortex, the North Pacific Oscillation （NPO）, and SST in the preceding winter and spring and atmospheric low-frequency disturbances in Northeast China. We analyzed these aspects to understand the atmosphere ocean physical coupling processes characterized by the two early signals, and here we explain the possible mechanisms through which dipole circulation anomalies affect the summer low-temperature processes in Northeast China. We further analyzed the interdecadal variation background and associated physical processes of the two early signals.

关 键 词：polar vortex NPO North Pacific SST atmosphere-ocean coupling summer low temperatures in Northeast China dipole pattern 

分 类 号：P461[天文地球—大气科学及气象学]