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

SHEN Junqiang; QIU Yun; GUO Xiaogang; PAN Aijun; ZHOU Xiwu

doi:10.1007/s13131-017-1120-1

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Article Navigation > Acta Oceanologica Sinica > 2017 > 36(11): 4-13

SHEN Junqiang, QIU Yun, GUO Xiaogang, PAN Aijun, ZHOU Xiwu. The spatio-temporal variation of wintertime subtidal currents in the western Taiwan Strait[J]. Acta Oceanologica Sinica, 2017, 36(11): 4-13. doi: 10.1007/s13131-017-1120-1

Citation:

SHEN Junqiang, QIU Yun, GUO Xiaogang, PAN Aijun, ZHOU Xiwu. The spatio-temporal variation of wintertime subtidal currents in the western Taiwan Strait[J]. Acta Oceanologica Sinica, 2017, 36(11): 4-13. doi: 10.1007/s13131-017-1120-1

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

doi: 10.1007/s13131-017-1120-1

1.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China

Received Date: 2017-03-27
Rev Recd Date: 2017-05-04

Abstract

Abstract

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 M₂ 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.
- counter-wind current,
- China coastal current,
- M₂ tidal current,
- Taiwan Strait,
- winter season

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References(47)

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