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dc.contributor.authorDing, Yang  Concept link
dc.contributor.authorChen, Changsheng  Concept link
dc.contributor.authorBeardsley, Robert C.  Concept link
dc.contributor.authorBao, Xianwen  Concept link
dc.contributor.authorShi, Maochong  Concept link
dc.contributor.authorZhang, Yu  Concept link
dc.contributor.authorLai, Zhigang  Concept link
dc.contributor.authorLi, Ruixiang  Concept link
dc.contributor.authorLin, Huichan  Concept link
dc.contributor.authorViet, Nguyen Trung  Concept link
dc.date.accessioned2014-03-12T18:43:49Z
dc.date.available2014-10-22T08:57:26Z
dc.date.issued2013-12-03
dc.identifier.citationJournal of Geophysical Research: Oceans 118 (2013): 6495–6510en_US
dc.identifier.urihttps://hdl.handle.net/1912/6478
dc.descriptionAuthor Posting. © American Geophysical Union, 2013. 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: Oceans 118 (2013): 6495–6510, doi:10.1002/2013JC009455.en_US
dc.description.abstractMoored 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. Rotary spectra showed two peaks at diurnal and semidiurnal periods, with higher diurnal energy. Complex demodulations of diurnal and semidiurnal tidal currents indicated that the tidal current magnitudes varied significantly with seasons: more energetic in the stratified summer than in the vertically well-mixed winter. The observed subtidal currents were highly correlated with the surface wind in winter but not in summer; challenging the conceptual summertime anticyclonic circulation pattern derived using wind-driven homogenous circulation theory. The computed currents from a global ocean model were in good agreement with the observed currents. Similar to the current observations, the model-computed flow patterns were consistent with the conceptual wind-driven circulation pattern in winter but opposite in summer. Process-oriented experiments suggest that the summertime cyclonic circulation in the northern Gulf of Tonkin forms as a result of the combination of stratified wind-driven circulation and tidal-rectified inflow from Qiongzhou Strait. The interaction between the southwest monsoon and buoyancy-driven flow from Hong River can significantly intensify the cyclonic circulation near the surface, but its contribution to the vertically averaged flow of the cyclonic circulation is limited.en_US
dc.description.sponsorshipY. Ding has been supported by the State Scholarship Fund from the China Scholarship Council. C. Chen serves as chief scientist for the International Center for Marine Studies, Shanghai Ocean University, and his contribution has been supported by the Program of Science and Technology Commission of Shanghai Municipality (09320503700). C. Chen serves as the Zi Jiang Scholar at the State Key Laboratory for Estuarine and Coastal Research (SKLEC) of East China Normal University (ECNU) and Visiting Professor at School of Marine Sciences, Sun Yat-Sen University. C. Chen would like to credit this research to these two universities. Z. Lai’s contribution is supported by NSFC project 41206005 and Sun Yat-Sen University 985 grant 42000–3281301. The development of Global-FVCOM was funded by the US National Science Foundation Office of Polar Programs through grants ARC0712903, ARC0732084, ARC0804029, and ARC1203393.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2013JC009455
dc.subjectCurrent measurementsen_US
dc.subjectCirculationen_US
dc.subjectNumerical modelingen_US
dc.titleObservational and model studies of the circulation in the Gulf of Tonkin, South China Seaen_US
dc.typeArticleen_US
dc.description.embargo2014-06-03en_US
dc.identifier.doi10.1002/2013JC009455


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