Internal tides are a predominant source of high‐frequency variability and diapycnal mixing in the ocean. Understanding their dynamics and lifecycle is necessary to better understand their role in the ocean circulation. In this study, we describe and quantify internal tide generation, propagation, and dissipation in a sector of the North Mid‐Atlantic Ridge, using high‐resolution numerical simulations with realistic bathymetry and stratification. We show that the generation and dissipation of internal tides, as well as the distribution of internal tides among vertical modes, exhibit high spatial variability. We find that topographic scattering leads to a significant transfer of energy toward high vertical modes and thereby enhances internal tide dissipation. On average, and especially on the ridge, this mechanism is dominant over the conversion from the barotropic tide for transferring energy to high (7) vertical modes. The magnitude of the scattering of the first baroclinic internal mode is found to be in good agreement with theoretical predictions.

中文翻译：

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北大西洋中脊的内部潮汐周期和地形散射

内部潮汐是海洋中高频变化和海床混合的主要来源。了解它们的动态和生命周期对于更好地了解它们在海洋环流中的作用是必要的。在本文中，我们使用具有实际测深和分层特征的高分辨率数值模拟，描述和量化了北大西洋中脊海域内部潮汐的产生，传播和消散。我们表明，内部潮汐的产生和消散以及内部潮汐在垂直模式之间的分布表现出很高的空间变异性。我们发现地形散射导致能量向高垂直模式的大量转移，从而增强了内部潮汐消散。平均而言，尤其是在山脊上，这种机制在从正压潮向能量转换到高（> 7）垂直模式的转换中起主导作用。发现第一斜斜内部模式的散射幅度与理论预测高度吻合。