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利用一个z坐标刚盖近似海洋环流模式,分别在吕宋-台湾以东的闭边界和开边界两种情况下,模拟了理想海底地形(1000 m平底)南海冬季和夏季上层环流的经向翻转(meridional overturning),目的是为了分析黑潮入侵南海的可能影响范围及其对南海上层环流经向翻转的改变,并比较这种影响的季节性差异。模式采用气候平均的海面风场驱动,热盐强迫采用基于向Levitus气候海面温度和盐度张弛的边界条件。从模拟结果来看,黑潮影响南海上层经向翻转的范围可达到10°N左右,从而驱动南海上层海洋形成一个不闭合的经向翻转。在冬季(1月份),海水从大约400～500 m深处自北向南输送,并且逐步上升,在表层返回北部;在夏季(6月份),也有类似的情形,海水从大约150～200 m深处自北向南输送,并且逐步上升,在表层返回北部。该经向翻转描述了南海中、上层水的运动路径,为研究南海风生-热盐环流动力学提供了理想化的参考依据。
Using a z-coordinate capping approximate ocean circulation model, the meridional overturning of the winter and summer upper circulation over the South China Sea in ideal seafloor topography (1000 m flat bottom) is simulated under both closed and open boundaries to the east of Luzon-Taiwan respectively (meridional overturning) in order to analyze the possible impact of the Kuroshio invasion of the South China Sea and its changes to the meridional overturning of the upper circulation in the South China Sea, and to compare the seasonal differences in such impacts. The model is driven by a climatologically averaged sea surface wind and hot salt is forced to use boundary conditions based on relaxation to the Levitus climate sea surface temperature and salinity. From the simulation results, the range over which the Kuroshio affected the upwelling of the upper SCS can reach about 10 ° N, driving the upper SCS to form a non-closed warp-overturn. In winter (January), seawater is transported from north to south at depths of about 400-500 m and gradually rises and returns to the north at the surface; in the summer (June) there is a similar situation where seawater flows from about 150-200 m deep Department from north to south delivery, and gradually rise in the surface to return to the north. The meridional inversion describes the movement path of the upper and middle waters in the South China Sea, and provides an ideal reference for the study of the wind-thermohaline circulation dynamics in the South China Sea.