摘要
用已成功地模拟了大尺度环流和黑潮的三维、斜压以及具自由海水表面的数值模式，模拟了冬季南海流场、温度场和海面高度场。所用网格为0．25°×0．25°，垂直方向分为6层；除巴土海峡和台湾海峡外，其它边界假设为封闭；巴士海峡和台湾海峡的边界值用已模拟的大尺度环流值。模拟结果基本上反映了南海冬季环流的特征。从模拟结果可知，黑潮从巴士海峡南部进入南海后，其大部分又从对21°以北返回大洋。巴士海峡西侧的气旋型环流似乎具有相对的独立性；当然，涡旋东侧在巴士海峡的N向流可能与黑潮水混合，而且从这支流中分离出－小支流继续向北，汇入到“南海暖流”中。黑潮水虽然大部分返回太平洋，但是巴士海峡西侧的气旋型环流是由巴士海峡处的黑潮诱发的，南海海底地形对南海环流的形态（特别是对“南海暖流”的形成）有很大的影响。
The model, which has been used to simulate successfully Kuroshio andlarge-scale current is used to simulate the flow, temperature and sea surface elevationfields of the South China Sea in winter. The grid size is 0.25°×0.25°. The waterbody is divided into 6 layers. The horizontal boundary is supposed to be close exceptthe Bashi and Taiwan Straits. The boundary values in the Bashi and Taiwan Straitscome from the simulation of Kuroshio. The results basically agree with observation.The simulation shows that part of Kuroshio enters into the South China Sea from thesouth of the Bashi Strait, and most of it returns to Pacific to the north of 21°N. Thecyclonic eddy in the western side of the Bashi Strait is also independent. The seawater in the east of cyclonic eddy flows northward and converges to the South ChinaSea Warm Current (SCSWC); another turns southwestward. The cyclonic eddy resultsfrom the Kuroshio in the Bashi Strait although the most of Kuroshio water returns toPacific. The topography of the South China Sea is important to the South China SeaCurrent and SCSWC.
出处
《热带海洋》
CSCD
1999年第2期48-55,共8页
基金
香港理工大学研究计划340/854资助
