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渤海为极浅陆架海 ,其中湍流耗散作用显著。将三维斜压陆架海模式 HAMSOM应用于渤海 ,以渤海周边台站每天 4次的常规气象资料作为风和热驱动 ,渤海海峡开边界以 5个主要分潮调和常数计算水位强迫 ,计算了渤海 1982年水文要素和流场变化 ,并用模式以湍的局地平衡理论封闭计算出垂直湍流粘性的时空分布。结果表明 :渤海湍流混合冬强夏弱 ,变化幅度较大 ( 10～ 2 0 0 cm2 / s) ,这是风搅拌和潮混合的湍流输入在密度层化调整下的结果 ;风的作用在冬季强于潮的作用 ,而底层则由潮混合控制呈现半月周期 ;渤海湍粘性系数的空间分布十分复杂 ,这是在渤海地形和岸形轮廓限制下 ,由一定大气条件驱动的流场和密度场导致的湍流混合强度不同所致
The Bohai Sea is a very shallow shelf sea, in which turbulent dissipation plays a significant role. The three-dimensional baroclinic sea model HAMSOM was applied to the Bohai Sea. Conventional meteorological data four times a day on the stations around the Bohai Sea were used as wind and heat drive. The water level forcing was calculated by using five main tidal harmonic constants at the open boundary of Bohai Strait. Year hydrological elements and flow field changes, and use the model to turbulent equilibrium theory of equilibrium to calculate the spatial and temporal distribution of vertical turbulent viscosity. The results show that turbulent mixing in the Bohai Sea is weak in winter and strong in summer, with a large variation range (10 ~ 200 cm2 / s), which is the result of density stratification adjustment of turbulent input of wind mixing and tidal mixing. Which is stronger than that of the tide, while the bottom layer presents a half-moon period by the tidal mixing control. The spatial distribution of the turbulent viscosity coefficient in the Bohai Sea is very complicated. The flow field and the density field are driven by certain atmospheric conditions under the constraints of the Bohai topography and the shore profile Resulting in different turbulent mixing intensity