  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.
