根据1996年10月中韩合作调查获得的CTD资料，分析探讨了南黄海秋季跃层的分布特征及垂直混合状况，同时对黄海冷水团的垂向混合进行了初步探讨．还利用改进后的逐步聚类分析法划分了表、底层水团，确定了各水团的温度、盐度、溶解氧和PH值4要素的平均特征值，并根据各水团的特性和温度、盐度的平面分布特征，重点探讨了黄海水与沿岸水及东海水的混合和交换． According to the CTD data obtained from the cooperative investigation between China and South Korea in October 1996, the distribution characteristics and vertical mixing of the autumn thermocline in the Southern Yellow Sea were analyzed. Vertical mixing of the Yellow Sea cold water mass was also discussed. The table and the bottom water mass were also divided by the improved stepwise cluster analysis to determine the average eigenvalue of the four elements of temperature, salinity, dissolved oxygen and pH of each water mass. According to the characteristics of each water mass and the temperature , Salinity of the plane distribution characteristics, focusing on the Yellow Sea water and coastal water and the East China Sea water mixing and exchange.