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首页> 外文期刊>Journal of Physical Oceanography >Wind- and Wave-Driven Ocean Surface Boundary Layer in a Frontal Zone: Roles of Submesoscale Eddies and Ekman-Stokes Transport
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Wind- and Wave-Driven Ocean Surface Boundary Layer in a Frontal Zone: Roles of Submesoscale Eddies and Ekman-Stokes Transport

机译:逆向区域中的风和波浪驱动的海面边界层:饲料的角色和ekman-Stokes运输

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摘要

Large-eddy simulations are used to investigate the influence of a horizontal frontal zone, represented by a stationary uniform background horizontal temperature gradient, on the wind- and wave-driven ocean surface boundary layers. In a frontal zone, the temperature structure, the ageostrophic mean horizontal current, and the turbulence in the ocean surface boundary layer all change with the relative angle among the wind and the front. The net heating and cooling of the boundary layer could be explained by the depth-integrated horizontal advective buoyancy flux, called the Ekman buoyancy flux (or the Ekman-Stokes buoyancy flux if wave effects are included). However, the detailed temperature profiles are also modulated by the depth-dependent advective buoyancy flux and submesoscale eddies. The surface current is deflected less (more) to the right of the wind and wave when the depth-integrated advective buoyancy flux cools (warms) the ocean surface boundary layer. Horizontal mixing is greatly enhanced by submesoscale eddies. The eddy-induced horizontal mixing is anisotropic and is stronger to the right of the wind direction. Vertical turbulent mixing depends on the superposition of the geostrophic and ageostrophic current, the depth-dependent advective buoyancy flux, and submesoscale eddies.
机译:大涡模拟用于研究水平正面区域的影响,该水平正面区域在风和波浪驱动的海洋表面边界层上的静止均匀背景水平温度梯度表示。在正面区域,温度结构,嗜型血液均线水平电流和海面边界层中的湍流随着风和前部的相对角度而变化。边界层的净加热和冷却可以通过深度综合的水平平流浮力通量来解释,称为ekman浮力通量(或者如果包括波效果,则ekman-stokes浮力通量)。然而,详细的温度曲线也通过深度依赖性平程性浮力通量和碱尺度eDDIES调节。当深度综合的平流浮力通量冷却(温暖)海面边界层时,表面电流越小(更多)向风和波的右侧偏转。 SubseScale Eddies大大增强了水平混合。涡流诱导的水平混合是各向异性的,并且在风向的右侧较强。垂直湍流混合取决于热性和嗜型电流的叠加,深度依赖性方向性浮力通量和饲料型eDDIES。

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