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Seasonal variation of atmospheric coupling with oceanic mesoscale eddies in the North Pacific Subtropical Countercurrent

Seasonal variation of atmospheric coupling with oceanic mesoscale eddies in the North Pacific Subtropical Countercurrent

作     者:Bowen Sun Baofu Li Jingyu Yan Yuqi Zhou Shuo Zhou Bowen Sun;Baofu Li;Jingyu Yan;Yuqi Zhou;Shuo Zhou

作者机构:School of Geography and TourismQufu Normal UniversityRizhao276800China Key Laboratory of Ocean Circulation and WavesInstitute of OceanologyChinese Academy of SciencesQingdao266071China 

出 版 物:《Acta Oceanologica Sinica》 (海洋学报(英文版))

年 卷 期:2022年第41卷第10期

页      面:109-118页

核心收录:

学科分类:07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基  金:The Shandong Provincial Natural Science Foundation under contract No.ZR2021YQ28 the Provincial College Student Innovation Training Project under contract No.S202110446040 

主  题:atmospheric response on mesoscale eddy seasonal variation subtropical countercurrent sea surface temperature-wind coupling 

摘      要:This study investigated the seasonal variation in the atmospheric response to oceanic mesoscale eddies in the North Pacific Subtropical Countercurrent(STCC)and its mechanism,based on satellite altimetric and reanalysis *** mesoscale eddy in the study area is more active in summer,the sea surface temperature(SST)anomaly associated with mesoscale eddies is more intense and dipolar in winter,which is largely due to the larger background SST ***,the impact of the oceanic eddy on sea surface wind speed and heat flux is strongest in winter,whereas its effect on precipitation rate is more significant in *** study revealed that the SST gradient in STCC could impact the atmosphere layer by up to 800 h Pa(900 h Pa)in boreal winter(summer)through the dominant vertical mixing ***,the intensity of the SST gradient causes such seasonal variation in mesoscale air-sea coupling in the study *** brief,a stronger(weaker)background SST gradient field in wintertime(summertime)leads to a larger(smaller)eddy-induced SST anomaly,thus differently impacting atmosphere instability and transitional kinetic energy flux over oceanic eddies,leading to seasonal variation in mesoscale air-sea coupling intensity.

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