Physics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jats...34..499f&link_type=abstract
Journal of the Atmospheric Sciences, vol. 34, Mar. 1977, p. 499-514.
Physics
4
Energy Transfer, Gravity Waves, Hydrostatics, Momentum Transfer, Venus Atmosphere, Wave Scattering, Energy Budgets, Energy Dissipation, Orography, Topography, Viscous Damping
Scientific paper
The paper analyzes the scattering of two-dimensional hydrostatic Boussinesq internal gravity waves by orographic features. The formulation of the problem is based on a hydrostatic Boussinesq fluid which is stably stratified and at rest with respect to the surface of the planet, assuming there is an unspecified source of internal waves aloft. The governing equations include damping due to Rayleigh friction and Newtonian cooling. Attention is directed to calculating the size of the flux produced by orographic features and to examining the redistribution of energy among the reflected and scattered waves. It is shown that the reflected momentum flux is larger than the incident flux. The way in which viscosity affects this result is discussed, showing that viscous dissipation may result in strong absorption of the scattered waves. For maximum topographic slope less than that of the incident wavefronts, a simple integral equation is derived and used for numerical calculation of the scattering from several different orographies. Results suggest that topographic scattering may substantially affect the tidal momentum flux in the Venusian atmosphere.
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