Impacts of Oceanic Fronts and Eddies in the Kuroshio-Oyashio Extension Region on the Atmospheric General Circulation and Storm Track  

作　　者：Guidi ZHOU Xuhua CHENG 

机构地区：[1]Key Laboratory of Marine Hazards Forecasting,Ministry of Natural Resources(MNR),Hohai University,Nanjing 210098,China [2]College of Oceanography,Hohai University,Nanjing 210098,China [3]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080,China

出　　处：《Advances in Atmospheric Sciences》2022年第1期22-54,共33页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.41906001);the Natural Science Foundation of Jiangsu Province(Grant No.BK20190501);the Fundamental Research Funds for the Central Universities(Grant No.B210202137)。

摘　　要：This paper reviews the progress in our understanding of the atmospheric response to midlatitude oceanic fronts and eddies,emphasizing the Kuroshio-Oyashio Extension(KOE)region.Oceanic perturbations of interest consist of sharp oceanic fronts,temperature anomalies associated with mesoscale eddies,and to some extent even higher-frequency submesoscale variability.The focus is on the free atmosphere above the boundary layer.As the midlatitude atmosphere is dominated by vigorous transient eddy activity in the storm track,the response of both the time-mean flow and the storm track is assessed.The storm track response arguably overwhelms the mean-flow response and makes the latter hard to detect from observations.Oceanic frontal impacts on the mesoscale structures of individual synoptic storms are discussed,followed by the role of oceanic fronts in maintaining the storm track as a whole.KOE fronts exhibit significant decadal variability and can therefore presumably modulate the storm track.Relevant studies are summarized and intercompared.Current understanding has advanced greatly but is still subject to large uncertainties arising from inadequate data resolution and other factors.Recent modeling studies highlighted the importance of mesoscale eddies and probably even submesoscale processes in maintaining the storm track but confirmation and validation are still needed.Moreover,the atmospheric response can potentially provide a feedback mechanism for the North Pacific climate.By reviewing the above aspects,we envision that future research shall focus more upon the interaction between smaller-scale oceanic processes(fronts,eddies,submesoscale features)and atmospheric processes(fronts,extratropical cyclones etc.),in an integrated way,within the context of different climate background states.

关 键 词：atmospheric response storm track oceanic front mesoscale eddy SUBMESOSCALE Kuroshio-Oyashio Extension 

分 类 号：P461[天文地球—大气科学及气象学]