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本文依据多年的东海水文观测资料，进一步分析了东海高密水核心及其上层环流的形成、演变特点和它对长江口外混合水扩散的影响。获得如下结果：１．东海高密水的形成是具有高温、高盐特性的台湾暖流水北上降温的必然结果。增密方程可以反映这一特点。２．东海高密水核心及其上层环流的形成与由台湾暖流发展引起的水团挤压有关。３．在春、夏季，东海高密水核心区上层环流的发展可对长江口外混合水（盐度为２３～３３）的扩散产生很大影响。这个环流可导致近岸盐度锋松弛，长江口外混合水沿具有低密特性的台湾暖流水和东海高密水之间的密度锋向外扩展。密度锋是长江口外混合水扩散的通道
Based on years of hydrological data from the East China Sea, this paper further analyzes the formation and evolution characteristics of the East China Sea high-density water core and its upper circulation and its effect on the diffusion of mixed water outside the mouth of the Yangtze River. Obtained the following results: 1. The formation of high density water in the East China Sea is the inevitable result of the cooling on the warm northern Taiwan with high temperature and high salinity characteristics. Densification equation can reflect this feature. 2. The formation of the Tokai core and its upper circulation are related to the water mass extrusion caused by the development of Taiwan’s warm current. 3. In the spring and summer, the development of the upper circulation in the core zone of the East China Sea high-density waters can have a significant impact on the diffusion of mixed water (salinity 23-33) outside the mouth of the Yangtze River. This circulation can lead to a relaxation of the salinity front of the nearshore, and mixed water along the Yangtze Estuary extends outward along the density front between Taiwan’s warm water with low density and the East China Sea high-density water. Density front is the channel of diffusion of mixed water outside the mouth of the Yangtze River