黄、渤海热结构及环流季节变化的数值模拟

Simulation of Seasonal Variation of Thermo-Structure and Circulation in the Bohai and Yellow Seas

在普林斯顿海洋模式 (POM)的基础上 ,利用经过资料同化处理的周平均卫星遥感海表温度资料 (SST) ,考虑了潮流混合和上层风混合的作用 ,成功模拟了渤黄海海域热结构的时、空变化 ;在此基础上 ,系统描述了渤黄海季节性温度跃层、黄海冷水团、黄海暖流等重要水文现象及其与之相应的温度垂直结构 ;分析黄海余流流场断面结构及随季节的变化 ,并对黄海暖流的分布结构。

Based on the Princeton Ocean Model (POM), Levitus 94 datasets and weekly average of Sea Surface Temperature (SST) and wind data from NOAA satellites, a three dimensional hydrodynamic model, which took into consideration of the M2 tide, was built and applied to simulate the annual cycle of temperature and circulation in the Yellow Sea and to reproduce the process of the Cool Water Mass in the Yellow Sea (CWMYS). The results show that the uniform pattern and stratification pattern are from January to March and from May to November, respectively. The local thermo structure is affected by the CWMYS and the Warm Current in the Yellow Sea (WCYS). The circulation is closely related to the wind field in the Yellow Sea. In winter, the WCYS consists of two branches, the one in the west being its main current. In summer, the circulation is very weak, especially in the center of the Yellow Sea. This weak current region, entrenched at the bottom until November, is an important factor of the CWMYS.