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基于Blumberg & Mellor三维非线性环流模型(ECOM)并结合Mellor ＆ Yamada的湍封闭模型,对黄海M2分潮、密度环流、锋区环流等进行了的数值模拟:潮汐模拟结果较好的体现了黄、渤海M2潮波传播系统,验证了模型的可行性;模拟密度环流的量阶和方向均与夏季实测环流保持一致,体现了密度环流是夏季总环流的重要组成部分;两个断面锋区环流的模拟结果显示锋区位置不同环流特征也不相同,锋区对应的上升流特征与锋区表面通常观测到冷水现象吻合,锋区上层水体沿潮汐锋方向流速较强。另外,数值试验结果显示了地形和潮混合对潮汐锋的形成及锋区环流有重要影响。
Based on Blumberg & Mellor three-dimensional nonlinear circulation model (ECOM) and Mellor & Yamada’s turbulent closed model, the numerical simulation of M2 tide, density circulation and frontal circulation in the Yellow Sea is carried out. The tide simulation results better reflect the yellow , Bohai M2 tidal wave propagation system to verify the feasibility of the model; the magnitude and direction of the simulated density circulation are consistent with the summer measured circulation, which shows that the density circulation is an important part of summer total circulation; the two frontal circulation The simulation results show that the characteristics of the different circulation in frontal area are also different. The upflow characteristics corresponding to the frontal area are consistent with the cold water generally observed on the surface of the frontal area, and the flow velocity in the upper frontier of the frontal area is stronger along the tidal front. In addition, the numerical results show that the topography and tidal mixing have a significant impact on the formation of tidal front and the frontal circulation.