夏季渤海中部环流结构研究

An Analysis of Summer Circulation in the Middle of the Bohai Sea

基于POM模式,并考虑波浪混合的作用,对夏季渤海中部环流的结构及其形成机制进行数值模拟研究。结果表明,夏季渤海中部存在一个顺时针环流。以地形和混合系数为参量的数值实验证实此顺时针环流的形成与渤海中部浅滩的特殊地形有关,而渤海中部的暖水团存在又加强了此处的顺时针环流。

Based on the Princeton Ocean Model(POM)with wave mixing,we study the summer circulation and its formation mechanism in the middle of the Bohai Sea.Our results show that there exists a clockwise cir- culation over a 20 m ridge in the middle of the Bohai Sea.We also conduct two numerical experiments by using the topography and mixing rate as the model parameters.The results show that both the ridge and warm water in the middle of the Bohai Sea are important for the formation of the clockwise circulation,the former deter- mining the circulation pattern and the latter increasing the strength.