On the winter circulation of the northern South China Sea and its relation to the large scale oceanic current |
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Authors: | Ma Hong |
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Institution: | (1) Institute of Oceanology, Academia Sinica, Qingdao |
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Abstract: | The nonwind-driven mechanism of the winter circulation in the northern South China Sea is discussed.
Linked by the Bashi Strait to the Pacific Ocean, the northern South Cnina Sea is treated as a part of the Pacific western
boundary where the circulation variation (except the very thin surface layer) is closely related to that of the ocean interior
and the effect of local wind might be neglected (at least for some seasons).
Based on the assumption that the thick and strong westward current which flows in through the Bashi Strait can effectively
prevent water exchange between the northern and southern South China Seas, the model sea only includes the northern part.
Barotropic numerical experiments show that part of this westward current is deflected by the continental slope and forms the
slope area NE current—the South China Sea Warm Current. Besides, the topographical flow fed by the extension of the western
boundary current and the anticyclonic eddy born near the eastern boundary are also fundamental components of the South China
Sea Warm Current. The reflection of the incident Rossby waves by the continental slope is found to be of significance in the
intensification of the South China Sea Warm Current.
Contribution No. 1362 from Institute of Oceanology, Academia |
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Keywords: | |
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