Origin and formation of the Ryukyu Current revealed by HYCOM reanalysis

作     者：Min Wang Zhaojun Liu Xiaohua Zhu Xiaomei Yan Zhongzhe Zhang Ruixiang Zhao 

作者机构：School of OceanographyShanghai Jiao Tong UniversityShanghai 200030China State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Key Laboratory of Ocean Circulation and WavesInstitute of OceanologyChinese Academy of SciencesQingdao 266071China College of Marine Science and EnvironmentDalian Ocean UniversityDalian 116023China 

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

年 卷 期：2019年第38卷第11期

页      面：1-10页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 

基　　金：The National Natural Science Foundation of China under contract Nos 41576001,41920104006,41776107,41906023,41621064,41476020 and 41606113 the Scientific Research Fund of SIO under contract Nos JG1626,JG1621 and JT1604 the Project of State Key Laboratory of Satellite Ocean Environment Dynamics,SIO under contract Nos SOEDZZ1901,SOEDZZ1804 and SOEDZZ1806 the National Programme on Global Change and Air-sea Interaction under contract No.GASI-IPOVAI-01-02 the Zhejiang Provincial Natural Science Foundation of China under contract No.LQ17D060003 

主　　题：origins of Ryukyu Current subsurface velocity core volume transport Kuroshio HYCOM 

摘      要：The origin of the Ryukyu Current(RC)and the formation of its subsurface velocity core were investigated using a 23-year(1993–2015)global Hybrid Coordinate Ocean Model(HYCOM)*** volume transport of the RC comes from the Kuroshio eastward branch(KEB)east of Taiwan and part of the North Pacific Subtropical Gyre(p-NPSG).From the surface to 2000m depth,the KEB(p-NPSG)transport contributes 41.5%(58.5%)to the mean total RC *** KEB originally forms the subsurface velocity core of the RC east of Taiwan due to blockage of the subsurface Kuroshio by the Ilan Ridge(sill depth:700 m).Above 700m,the Kuroshio can enter the East China Sea(ECS)over the Ilan Ridge,meanwhile,the blocked Kuroshio below 700m turns to the right and flows along the Ryukyu *** the RC flowing northeastward,the p-NPSG contribution strengthens the subsurface maximum structure of the RC owing to the blockage of the Ryukyu *** the surface layer,the p-NPSG cannot form a stable northeastward current due to frequent disturbance by mesoscale eddies and water exchange through the gaps(with net volume transport into ECS)between the Ryukyu Islands.