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首页> 外文期刊>Journal of oceanography >Internal Wave Generation by Tidal Flow over a Continental Shelf Slope
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Internal Wave Generation by Tidal Flow over a Continental Shelf Slope

机译：大陆架斜坡上潮汐流产生的内波

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摘要

The generation process of internal waves by strong tidal flow over a continental shelf slope is reproduced using a multi-level numerical model. On the basis of the numerical results, the crucial role of the tidal advection effect in the generation process of internal waves is demonstrated. The close relation between the resulting internal waveform and the strength of the tidal advection effect is also examined. The barotropic forcing on the internal wave actually works within a relatively small horizontal scale over the top of the continental shelf slope. When the maximum internal Froude number at the shelf break (Fr_m) is less than about 0.6, the amplitude of the resulting internal wave is almost proportional to Fr_m. When Fr_m is more than about 0.6, however, the amplitude of the resulting internal wave becomes larger than predicted by linear theory. In particular, when Fr_m is more than unity, the time period during which the shoreward propagating internal wave stays in the barotropic forcing region becomes much longer. Consequently, the internal wave is significantly amplified with the horizontal scale approaching that of the barotropic forcing, which concentrates in a relatively small region over the top of the continental shelf slope.
机译：使用多层数值模型再现了大陆架斜坡上强潮汐流引起的内波产生过程。根据数值结果，证明了潮汐平流效应在内波产生过程中的关键作用。还检查了所得内部波形与潮汐平流效应强度之间的密切关系。内部波的正压强迫实际上在大陆架斜坡顶部的较小水平范围内起作用。当搁板中断处的最大内部弗洛德数（Fr_m）小于约0.6时，所得内部波的振幅几乎与Fr_m成比例。但是，当Fr_m大于0.6时，所产生的内部波的幅度变得大于线性理论所预测的幅度。特别地，当Fr_m大于1时，向岸传播的内波停留在正压强迫区域中的时间段变得更长。因此，内部波在接近正压强迫的水平尺度下被显着放大，其集中在大陆架斜坡顶部上方的一个相对较小的区域。

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