The salinity distribution characteristics are the high - salinity in the bohai bay and the low - salinity in the boahi strait . the density distribution shows that there is a large cyclonic density circulation in bohai sea and it is likely to exist some density current gyre in the middle part of the bohai sea . in winter the saddle - like pattern of the bohai sea temperature and salinity shows that the circulation structure is much complexer than the previous research results 密度分布表明：夏季渤海湾口已经由以前的低密度中心变为现在的高密度中心，相应的环流结构也必会发生大的变化；夏季渤海中部会存在一个反气旋式的密度环流，并在局部可能存在多个密度流涡环；冬季渤海“马鞍状”温盐结构反映其密度环流结构要比以往研究结果复杂得多。
