Tidal Conversion by Supercritical Topography
نویسندگان
چکیده
منابع مشابه
Tidal Conversion by Supercritical Topography
Calculations are presented of the rate of energy conversion of the barotropic tide into internal gravity waves above topography on the ocean floor. The ocean is treated as infinitely deep, and the topography consists of periodic obstructions; a Green function method is used to construct the scattered wavefield. The calculations extend the previous results of Balmforth et al. for subcritical top...
متن کاملTidal Conversion by Subcritical Topography
Analytical estimates of the rate at which energy is extracted from the barotropic tide at topography and converted into internal gravity waves are given. The ocean is idealized as an inviscid, vertically unbounded fluid on the f plane. The gravity waves are treated by linear theory and freely escape to z 5 `. Several topographies are investigated: a sinusoidal ripple, a set of Gaussian bumps, a...
متن کاملExperimental study of internal gravity waves generated by supercritical topography
Oscillatory tides flowing over rough topography on the ocean floor generate internal gravity waves, which are a major source of ocean mixing. Linear inviscid theory can describe waves generated by gentle topography with slopes that are less steep than the propagation angle of the internal waves; such topography is termed subcritical. However, a clear physical picture of internal waves generated...
متن کاملTidal Conversion at a Submarine Ridge
The radiative flux of internal wave energy (the “tidal conversion”) powered by the oscillating flow of a uniformly stratified fluid over a two-dimensional submarine ridge is computed using an integral-equation method. The problem is characterized by two nondimensional parameters, A and B. The first parameter, A, is the ridge half-width scaled by h, where h is the uniform depth of the ocean far ...
متن کاملTidal conversion at a very steep ridge
where ρ0 is the mean density of seawater, U cos(ωt) the tidal velocity, and f the Coriolis frequency. The function M(b/h) increases monotonically with M(0)= 1, M(0.92)= 2 and M(1)=∞. As b/h→ 1, M diverges logarithmically and consequently the radiated power grows as ln[(h − b)/b]. We also calculate the conversion in a realistically stratified ocean with strongly non-uniform buoyancy frequency, N...
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ژورنال
عنوان ژورنال: Journal of Physical Oceanography
سال: 2009
ISSN: 1520-0485,0022-3670
DOI: 10.1175/2009jpo4057.1