On the dynamics of the South China Sea Warm Current
MetadataShow full item record
The South China Sea Warm Current (SCSWC) flows northeastward over the shelf and continental slope in the northern South China Sea (SCS). This current persists in its northeastward direction in all seasons despite the fact that the annually averaged wind stress is decisively southwestward against it. Two major mechanisms have been proposed in previous studies, one attributing it directly to the wind stress forcing within the SCS and the other to the Kuroshio intrusion through the Luzon Strait. In this study we use a simple model to demonstrate that neither of them is the leading forcing mechanism. Instead, the SCSWC is a source- and sink-driven flow induced by the Taiwan Strait Current (TSC), a year-round northward flow through the Taiwan Strait. The two previously suggested mechanisms are important but secondary. The model simulations show that the local wind stress alone would force a current in the opposite direction to the SCSWC. Blocking the Kuroshio intrusion through the Luzon Strait, on the other hand, only weakens the SCSWC. The SCSWC vanishes when the Taiwan Strait is closed in the model.
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): C08003, doi:10.1029/2007JC004427.
Showing items related by title, author, creator and subject.
Yang, Jiayan; Lin, Xiaopei; Wu, Dexing (John Wiley & Sons, 2013-12-16)The Luzon Strait transport (LST) of water mass from the Pacific Ocean to the South China Sea (SCS) varies significantly with seasons. The mechanisms for this large variability are still not well understood. The steady-state ...
Ding, Yang; Chen, Changsheng; Beardsley, Robert C.; Bao, Xianwen; Shi, Maochong; Zhang, Yu; Lai, Zhigang; Li, Ruixiang; Lin, Huichan; Viet, Nguyen Trung (John Wiley & Sons, 2013-12-03)Moored current measurements were made at one mooring site in the northern Gulf of Tonkin for about 1 year during 1988–1989. Analyses were performed to examine characteristics and variability of tidal and subtidal flows. ...
Chen, Changsheng; Lai, Zhigang; Beardsley, Robert C.; Xu, Qichun; Lin, Huichan; Viet, Nguyen Trung (American Geophysical Union, 2012-03-21)The high-resolution, unstructured grid Finite-Volume Community Ocean Model (FVCOM) was used to examine the physical mechanisms that cause current separation and upwelling over the southeast shelf of Vietnam in the South ...