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利用气候平均的风应力资料,计算了平底南海内区海盆尺度的Sverdrup输送,得到南海海盆尺度Sverdrup环流的季节变化基本特征。将这些基本特征与历史观测资料相比,证实了在冬、夏、秋季风生环流在南海表层环流中的重要地位。明确指出风的非均匀性是南海海盆尺度环流呈现多中心的重要原因之一,秋、冬季南海北部18°N纬带处的西向强流可仅由局地风生成,南海南部环流比北部环流具有更明显的季节变化,春季风场有利于在海盆的中部发生环流的季节转换,秋季气旋式环流的向北输送最大。
Based on the average wind stress data of the climate, the Sverdrup transport of the basin scale in the flat bottom South China Sea was calculated and the seasonal variations of the Sverdrup circulation in the South China Sea basin scale were obtained. Comparing these basic features with the historical data, it confirms the importance of wind-driven circulation in the surface circulation of the South China Sea in winter, summer and autumn. It is pointed out that the wind nonuniformity is one of the important reasons for the multi-center circulation in the South China Sea. The strong westward flow at 18 ° N latitude in the northern South China Sea in autumn and winter can be generated by local winds only, and the circulation in the southern South China Sea is greater than that in the northern circulation With more obvious seasonal changes. The spring wind field is conducive to the seasonal conversion of the circulation in the middle of the basin, and the transportation of the autumn cyclonic circulation to the north is the largest.