The spatio-temporal variation of wintertime subtidal currents in the western Taiwan Strait

查看全文 作　　者：SHEN [1]Junqiang;QIU [1,2]Yun;GUO [1]Xiaogang;PAN [1]Aijun;ZHOU [1]Xiwu

机构地区：[1]Third Institute of Oceanography,State Oceanic Administration;[2]Laboratory for Regional Oceanography and Numerical Modeling,Qingdao National Laboratory for Marine Science and Technology

出　　处：《Acta Oceanologica Sinica》索引2017年第36卷第11期,共10页

基　　金：The National Natural Science Foundation of China under contract Nos 41506014,41306027 and 41276034;the Scientific Research Foundation of Third Institute of Oceanography,State Oceanic Administration under contract No.2017011;the State Oceanic Administration Program on Global Change and Air-Sea Interactions under contract Nos GASI-IPOVAI-02,GASIIPOVAI-03 and GASI-03-01-01-04;the Chinese Academy of Sciences Strategic Leading Science and Technology Projects under contract No.XDA1102030104 摘　　要：A new data set of observations by six cruises of ship-mounted acoustic doppler current profiler(SADCP) and three 40 d long bottom-mounted ADCPs(BADCPs) is employed to reveal the spatiotemporal variability of tidal and subtidal currents in the western Taiwan Strait(TWS) during winter season. The results confirm the existence of intense cotidal lines for M_2 tidal current, which is located north of 25°N. In this case, no existence of an amphidromic point can be identified. It is also revealed that the counter-wind current(CWC) can extend through the whole western TWS and even occupy the entire water column during winter monsoon relaxation. However,this CWC is observed to be thoroughly overwhelmed by the downwind China coastal current(CCC) during the two big monsoon bloom events in the winter of 2007, and the CCC consequently extends southward throughout the western TWS instead. Most importantly, the variation of the spatial extent for the CWC and the CCC in the western TWS is found to be well explained by the first two modes of the vector empirical orthogonal function(VEOF) analysis, that is, it is mainly controlled by a wind-driven quasi barotropic current as the first mode and slightly modulated by a relatively weak background current with a first-order baroclinic structure as the second mode. 关键词：counter-wind current China coastal current M2 tidal current Taiwan Strait winter season

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The spatio-temporal variation of wintertime subtidal currents in the western Taiwan Strait

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