Directional decomposition of internal tides propagating from multiple generation sites

Internal tides generated from multiple sites create complicated interference patterns, often making it difficult to identify the origin, direction of propagation, and dissipation individual waves. To these constituent waves, we apply a directional Fourier filter (DFF) method analyse multimodal, broad-wavenumber, internal wave fields found over varying topography. We data derived both numerical model satellite remote sensing observations. Using series two-dimensional (i.e. x–z) simulations, first demonstrate capability DFF separate incoming reflected emanating supercritical slope. The results show requires sampling rates Δt∕T<0.15 horizontal cell sizes Δx∕λ<0.2, where T is period λ wavelength. Remote can significantly affect generation propagation local in regional ocean simulations. gridded altimetry product at three globally diverse regions, how be used specify tide boundary conditions open boundaries models. Lastly, three-dimensional hydrostatic simulation southern Australian North West Shelf estimate energy decay characteristics tides. length scale, for offshore-propagating waves continental slope, was estimated two mode-1 wavelengths 240 km), close agreement with an satellite-derived sea surface height anomaly.