论文标题
长浪海中短海洋内波的广义运输表征
Generalized Transport Characterizations for Short Oceanic Internal Waves in a Sea of Long Waves
论文作者
论文摘要
海洋中的内波与三合会相互作用。早期的工作强调了极端分离的相互作用的重要性，其中两个大的波数波与一个小波数波相互作用。最近的努力使这一早期范式提出了质疑。我们使用波湍流动力学方程和射线追踪WKB技术来得出两个版本的相应的fokker-Planck（广义扩散）方程。然后，我们使用这些Fokker-Planck方程来估计光谱通量向耗散的光通量（高波数）我们获得了不同的结果：动力学方程Fokker-Planck方程的光谱传输是比观测值或报告的射线示踪估计值大的数量级。这种明显的矛盾源于这些比例分离相互作用的欧拉和射线路径描述之间的差异。
Internal waves in the ocean interact in triads. Early work emphasized the importance of extreme-scale separated interactions in which two large wavenumber waves interact with one small wavenumber wave. More recent efforts have called this early paradigm into question. We use wave turbulence kinetic equation and the ray-tracing WKB technique to derive two versions of the corresponding Fokker-Planck (generalized diffusion) equation. We then use these Fokker-Planck equations to estimate the spectral energy flux towards dissipation (high wave numbers) we obtain different results: spectral transport of the kinetic equation Fokker-Planck equation is an order of magnitude larger than either observations or reported ray tracing estimates. This apparent contradiction stems from the difference between Eulerian and ray-path descriptions of these scale-separated interactions.
