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Scattering of gravity waves by potential vorticity in a shallow-water fluid

Ward, Marshall; Dewar, William K


The influence of a geostrophically balanced or potential vorticity (PV) containing background flow on the propagation of a coherent gravity wave is examined in a rotating shallow-water model. Over inertial time scales, we find that the gravity wave energy is scattered into other modes of similar wavelength, but with different directions of propagation. We attribute this response to nonlinear resonant interactions between the PV and gravity wave modes, despite the absence of any exchange of...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Journal of Fluid Mechanics
DOI: 10.1017/S0022112010003721


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