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南海环流的一个主要特征是上层海洋环流具有多涡结构，海洋中尺度涡旋的演变（时间上的生消和空间上的迁移）是南海环流季节调整的可能方式．文中依据卫星遥感海面高度资料和实际海洋观测所揭示的南海北部存在中尺度涡旋体系的基本事实，采用一个改进了涡分辨（ｅｄｄｙ－ｒｅｓｏｌｖｉｎｇ）普林斯顿海洋模式（ＰＯＭ），对冬季处于强盛的东北季风强迫以及黑潮在巴士海峡入侵的共同作用下的南海北部环流的中尺度涡旋体系进行了数值研究，初步再现了冬季南海北部中尺度涡的生命史．计算结果表明，在实际的气候冬季风应力驱动下，具有的实际侧边界地形的南海北部呈现有强烈的中尺度涡旋．文中探讨了中尺度涡的垂直结构、温盐场的配置以及大尺度水平辐合辐散、海洋垂直运动与之相关的时空结构．由此可以得知，在冬季南海北部中尺度涡旋生命史的不同阶段，上述动力学因子的重要性是相对的．不同的敏感性试验表明，斜压调整是形成冬季南海中尺度涡旋体系的决定性因子；边界的入流和风应力驱动是影响中尺度涡旋运动的主要因素．
One of the main features of the SCS circulation is that the upper ocean circulation has a multi-vortex structure. The evolution of the mesoscale vortex (temporal elimination and spatial migration) is a possible way to adjust the SCS seasonal season. Based on the basic fact that mesoscale vortex systems exist in the northern South China Sea as revealed by satellite remote sensing sea level data and actual ocean observations, an improved eddy-resolving Princeton ocean model (POM) The monsoon force and the meso-scale vortex system of the north circulation of the South China Sea under the combined action of the Kuroshio and the invasion of the Bus Strait. The mesoscale eddies of the northern South China Sea are reproduced in winter. The calculation results show that there is a strong mesoscale vortex in the northern South China Sea driven by the actual winter wind stress of the actual lateral boundary topography. In this paper, we discuss the vertical structure of mesoscale vortex, the configuration of temperature and salinity fields, and the large-scale horizontal convergence and divergence, and the temporal and spatial structures related to the vertical ocean movement. From this we can see that the importance of the above kinetic factors is relative at different stages of the mesoscale vortex life history in the northern South China Sea in winter. Different sensitivity tests show that baroclinic adjustment is the decisive factor for the formation of the mesoscale vortex in the South China Sea in winter; the inflow of the boundary and the wind-driven stress are the main factors affecting the mesoscale vortex.