Three-dimensional characteristics of mesoscale eddies simulated by a regional model in the northwestern Pacific Ocean during 2000–2008

作     者：Guijing Yang Xiayan Lin Guoqing Han Yu Liu Gengxin Chen Jianhui Wang Guijing Yang;Xiayan Lin;Guoqing Han;Yu Liu;Gengxin Chen;Jianhui Wang

作者机构：Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan316000China State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of OceanographyMinistry of Natural ResourcesHangzhou310012China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai519082China State Key Laboratory of Tropical OceanographySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou510301China 

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：74-93页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：The National Natural Science Foundation of China under contract Nos NSFC 41806030 and 42076021 the China Ocean Mineral Resources Research and Development Association Program under contract No.DY135-E2-3-01 the Basic Scientific Research Business Expenses of Zhejiang Provincial Universities under contract No.2020J00007 the project of State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences under contract No.LTO1807 the project of Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)under contract No.SML2020SP007 the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)under contract No.311020004 the Strategic Priority Research Program of Chinese Academy of Sciences under contract No.XDB42000000 

主　　题：three-dimensional structures mesoscale eddies northwestern Pacific Ocean 

摘      要：Mesoscale eddies play vital roles in ocean *** previous studies focused on eddy surface features and individual three-dimensional(3D)eddy cases in the northwestern Pacific Ocean,the analysis of unique eddy3D regional characteristics is still lacking.A 3D eddy detection scheme is applied to 9 years(2000-2008)of eddyresolving Regional Ocean Modeling System(ROMS)output to obtain a 3D eddy dataset from the surface to a depth of 1000 m in the northwestern Pacific Ocean(15°-35°N,120°-145°E).The 3D characteristics of mesoscale eddies are analyzed in two regions,namely,Box1(Subtropical Countercurrent,15°-25°N,120°-145°E)and Box2(Southern Kuroshio Extension,25°-35°N,120°-145°E).In Box1,the current is characterized by strong vertical shear and weak horizontal *** Box2,the current is characterized by the strong Kuroshio,topographic effect,and the westward propagation of Rossby *** results indicate the importance of baroclinic instability in Box1,whereas in Box2,both the barotropic and baroclinic instability are ***,the mesoscale eddies’properties in Box1 and Box2 are *** eddies in Box1 have larger number and radius but a shorter *** contrast,Box2 has fewer eddies,which have smaller radius but longer ***,more eddies are detected at the subsurface than at the surface in both regions;the depth of 650 m is the turning point in *** this depth,the number of cyclonic eddies(CEs)is larger than that of anticyclonic eddies(AEs).In Box2,the number of CEs is dominant *** kinetic energy(EKE)and mean normalized relative vorticity in Box2are significantly higher than those in *** increasing depth,the attenuation trend of EKE and relative vorticity of Box1 become greater than those of ***,the upper ocean(about 300 m in depth)contains 68.6%of the eddies(instantaneous eddy).Only 16.6%of the eddies extend to 1000 *** addition,about87%of the eddies are bowl-shaped eddies in the two reg