Dynamic Linkage between the North Pacific and the Tropical Pacific:Atmosphere-Ocean Coupling  

作　　者：李春 吴立新 

机构地区：[1]Physical Oceanography Laboratory & Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong,Ocean University of China

出　　处：《Advances in Atmospheric Sciences》2013年第2期306-314,共9页大气科学进展（英文版）

基　　金：supported by the National Basic Research Program of China (Grant Nos.2012CB955603 and 2013CB956201);by the National Natural Science Foundation of China (NSFC) (Grant Nos.40830106,40906003,41130859,and 41276002)

摘　　要：In this study, dynamic linkage of atmosphere-ocean coupling between the North Pacific and the tropical Pacific was demonstrated using a large number of ensemble perturbed initial condition experiments in a fully coupled fast ocean-atmosphere model （FOAM）. In the FOAM model, an idealized mixed layer warming was initiated in the Kuroshio-Oyashio extension region, while the ocean and atmosphere remained fully coupled both locally and elsewhere. The modeling results show that the warm anomalies are associated with anomalous cyclonic winds, which induce initial warming anomalies extending downstream in the following winter. Then, the downstream warming spreads southwestward and induces SST warming in the equatorial Pacific via surface wind-evaporation-SST feedback. Warming in the tropical Pacific is further reinforced by Bjerknes＇ feedback.In this study, dynamic linkage of atmosphere-ocean coupling between the North Pacific and the tropical Pacific was demonstrated using a large number of ensemble perturbed initial condition experiments in a fully coupled fast ocean-atmosphere model （FOAM）. In the FOAM model, an idealized mixed layer warming was initiated in the Kuroshio-Oyashio extension region, while the ocean and atmosphere remained fully coupled both locally and elsewhere. The modeling results show that the warm anomalies are associated with anomalous cyclonic winds, which induce initial warming anomalies extending downstream in the following winter. Then, the downstream warming spreads southwestward and induces SST warming in the equatorial Pacific via surface wind-evaporation-SST feedback. Warming in the tropical Pacific is further reinforced by Bjerknes＇ feedback.

关 键 词：Kuroshio-Oyashio extension ENSO atmosphere ocean coupling wind-evaporation-SST feed-back Bjerknes＇ feedback 

分 类 号：P461.2[天文地球—大气科学及气象学]