The numerical studies on the ocean turbulent mixing processes near the generation sites of internal gravity waves

海洋中强烈湍流混合的激发集中在重力内波的产生地点附近，例如在大气扰动下的表层内，或在与正压潮流相互作用的突出地形特征上方。在这项研究中，我们首先用大涡模拟(LES)来研究强风强迫引起的表层海洋中的湍流混合过程。大涡模拟的结果被用来评估现有的湍流参数化模式的性能。接下来，我们对在突出地形上产生的内潮波进行了三维全球数值模拟，并估计了在零网格间距限制下内潮能转换率的全球分布。

The excitation of intense turbulent mixing in the ocean is concentrated near the generation sites of internal gravity waves such as within the surface layers under atmospheric disturbances or over prominent topographic features interacting with barotropic tidal currents. In this study, we first carry out Large Eddy Simulation (LES) to investigate turbulent mixing processes in the surface ocean caused by strong wind forcing. The results of LES are used to evaluate the performance of existing turbulence parameterization models. Next, we carry out three-dimensional global numerical simulations of internal tidal waves generated over prominent topographic features, and estimate the global distribution of internal tidal energy conversion rate in the limit of zero grid spacing.