Instability and focusing of internal tides in the deep ocean

摘要: (Received 18 December 2006 and in revised form 7 April 2007) The interaction of tidal currents with sea-floor topography results the radiation internal gravity waves into ocean interior. These are called tides their dissipation due to nonlinear wave breaking concomitant threedimensional turbulence could play an important role mixing abyssal ocean, hence controlling large-scale circulation. As part on-going work aimed at providing a theory for vertical distribution over topography, this paper we investigate instability very simple linear model that helps us relate formation unstable regions features topography. For two-dimensional one-dimensional find overturning instabilities is closely linked singularities shape it possible have stable sea floor interior above. three-dimensional there addition effect geometric focusing energy localized high amplitude, examples. Overall, can be highly non-uniform even idealized shapes.