Abstract
Free inertia-gravity internal waves are considered in a two-dimensional vertically nonuniform flow in the Boussinesq approximation. The equation for vertical velocity amplitude includes complex factors caused by the gradient of the flow velocity component transverse to the wave-propagation direction; therefore, the eigenfunction and wave frequency are complex. It is shown that the decrement of damping (imaginary correction to the frequency) of 15-min internal waves is two orders of magnitude smaller than the wave frequency; i.e., the waves weakly damp. Vertical wave fluxes of heat and salt are nonzero due to the phase shift between fluctuations of the vertical velocity and temperature (salinity) different from π 2. The vertical component of the Stokes drift speed is also nonzero and contributed into the vertical transport.
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Original Russian Text © A.A. Slepyshev, D.I. Vorotnikov, 2017, published in Izvestiya Rossiiskoi Akademii Nauk, Fizika Atmosfery i Okeana, 2017, Vol. 53, No. 4, pp. 532–541.
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Slepyshev, A.A., Vorotnikov, D.I. Vertical heat and salt fluxes induced by inertia-gravity internal waves on sea shelf. Izv. Atmos. Ocean. Phys. 53, 467–475 (2017). https://doi.org/10.1134/S0001433817040119
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DOI: https://doi.org/10.1134/S0001433817040119