The seasonal foot printing mechanism of spring Arctic sea ice in the Bergen climate models  

作　　者：GUO Dong GAO Yongqi GONG Daoyi 

机构地区：[1]Climate Change Research Center,Chinese Academy of Sciences [2]Nansen-Zhu International Research Center,Institute of Atmospheric Physics,Chinese Academy of Sciences [3]Nansen Environmental and Remote Sensing Center/Bjerknes Center for Climate Research,Bergen,Norway [4]State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University

出　　处：《Advances in Polar Science》2014年第4期283-288,共6页极地科学进展（英文版）

基　　金：supported by the Chinese Academy of Sciences Innovation Program (Grant no.XDA05110203);the Ocean Public Welfare Scientific Research Project of China (Grant no.201205007);the National Natural Science Foundation of China (Grant no.41375083);the Chinese National Basic Research Program (Grant no.2010CB951802);the Special Fund for Public Welfare Industry (meteorology) (Grant no.GYHY201306026);the project "Impact of ‘Blue Arctic’ on Climate at High Latitudes (Grant no. Blue Arc 207650/ E10)" supported by the Research Council of Norway

摘　　要：The influence of spring Arctic sea ice variability on the Pacific Decadal Oscillation （PDO） like sea surface temperature （SST） variability is established and investigated using an Atmosphere Ocean General Circulation Model （AOGCM） of the Bergen Climate Model version 2 （BCM2）. The spring Arctic sea ice variability affects the mid-latitudes and tropics through the propagation of the anomalous Eliassen-Palm （E-P） flux from the polar region to mid- and low-latitudes during boreal spring. The pathway includes anomalous upward wave activity, which propagates to the high troposphere from near the surface of the polar region, turns southward between 500 hPa and 200 hPa and extends downward between 50~N and 70~N, influencing the near surface atmospheric circulation. The alteration of the near surface atmospheric circulation then causes anomalous surface ocean circulation. These circulation changes consequently leads to the SST anomalies in the North Pacific which may persist until the following summer, named seasonal ＂foot printing＂ mechanism （SFPM）.The influence of spring Arctic sea ice variability on the Pacific Decadal Oscillation （PDO） like sea surface temperature （SST） variability is established and investigated using an Atmosphere Ocean General Circulation Model （AOGCM） of the Bergen Climate Model version 2 （BCM2）. The spring Arctic sea ice variability affects the mid-latitudes and tropics through the propagation of the anomalous Eliassen-Palm （E-P） flux from the polar region to mid- and low-latitudes during boreal spring. The pathway includes anomalous upward wave activity, which propagates to the high troposphere from near the surface of the polar region, turns southward between 500 hPa and 200 hPa and extends downward between 50~N and 70~N, influencing the near surface atmospheric circulation. The alteration of the near surface atmospheric circulation then causes anomalous surface ocean circulation. These circulation changes consequently leads to the SST anomalies in the North Pacific which may persist until the following summer, named seasonal ＂foot printing＂ mechanism （SFPM）.

关 键 词：Arctic sea ice seasonal foot printing mechanism North Pacific sea surface temperature E-P flux 

分 类 号：P731.15[天文地球—海洋科学] P461.2