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首页> 外文期刊>Journal of Physical Oceanography >Effect of Planetary Rotation on Oceanic Surface Boundary Layer Turbulence
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Effect of Planetary Rotation on Oceanic Surface Boundary Layer Turbulence

机译：行星自转对海洋表面边界层湍流的影响

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摘要

A large-eddy simulation (LES) model is configured to investigate the effect of the horizontal (northward) component of Earth's rotation are the largest in the tropics and decrease with increasing latitudes. The variability in turbulent flows to wind direction is different at different latitudes and in opposite hemispheres. When limited by stable stratification, the variability in turbulence intensity to wind direction reduces, but the entrainment rate changes with wind direction. In wave-driven Langmuir turbulence, the variability in mean current to wind direction is reduced, but the variability of turbulence to wind direction is evident. When there is wind-following swell, the variability in the mean current to wind direction is further reduced. When there is strong wind-opposing swell so that the total wave forcing is opposite to the wind, the variability in the mean current to wind direction is reduced, but the variability of turbulence to wind direction is enhanced, compared to in Ekman turbulence. The profiles of eddy viscosity, including its shape and its value, show a strong wind direction dependence for both stratified wind-driven and wave-driven Langmuir turbulence. Our study demonstrates that wind direction is an important parameter to upper-ocean mixing, though it is overlooked in existing ocean models.
机译：配置大涡模拟（LES）模型以研究地球自转的水平（向北）分量在热带地区最大并随纬度增加而减小的影响。在不同纬度和相对的半球中，湍流向风向的变化是不同的。当受到稳定分层的限制时，湍流强度随风向的变化性减小，但是夹带率随风向而变化。在波浪驱动的朗缪尔湍流中，平均电流相对于风向的变化减小了，但是湍流相对于风向的变化却很明显。当有跟风膨胀时，平均电流相对于风向的变化会进一步减小。当强烈的风向膨胀使总的波浪力与风相反时，与埃克曼湍流相比，平均电流相对于风向的变化性减小了，但湍流相对于风向的变化性却增强了。涡流粘度的形状，包括其形状和值，对于分层的风驱动和波驱动的朗缪尔湍流均显示出强烈的风向依赖性。我们的研究表明，风向是上层海洋混合的重要参数，尽管在现有海洋模型中已被忽略。

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