Wave-averaged balance: a simple example

11 Nov 2020 Kafiabad Hossein A. Vanneste Jacques Young William R.

In the presence of inertia-gravity waves, the geostrophic and hydrostatic balance that characterises the slow dynamics of rapidly rotating, strongly stratified flows holds in a time-averaged sense and applies to the Lagrangian-mean velocity and buoyancy. We give an elementary derivation of this wave-averaged balance and illustrate its accuracy in numerical solutions of the three-dimensional Boussinesq equations, using a simple configuration in which vertically planar near-inertial waves interact with a barotropic anticylonic vortex... (read more)

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  • ATMOSPHERIC AND OCEANIC PHYSICS
  • FLUID DYNAMICS