本文根据横贯北黄海冷水团的大连—成山角断面的４２年观测资料，采用“相似系数”方法分析了北黄海冷水团的分布范围、低温中心位置、厚度、相对体积、温、盐特征等的多年变化特征。根据诸特征的标准离差，将这４２年北黄海冷水团划分为强、弱和平年三种情况 Based on the 42-year observation data of the Dalian-Chengshanjiao section of the northern Yellow Sea cold water mass, the distribution range, central location, thickness, relative volume, temperature and salinity of the cold water mass in the North Yellow Sea were analyzed by the “similarity coefficient” method Years of changing characteristics. According to the standard deviations of the features, the 42-year North Yellow Sea cold-water mass is divided into three types: strong, weak and flat