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Divergence Damping
Dispersion of gravity-inertia waves alone can explain linear geostrophic adjustment on an infinite plane
“In a finite domain, unless viscosity is introduced, gravity waves will forever ‘slosh’ without dissipating.” (e.g., Vallis, 1992, JAS)
Numerical experiments by Farge and Sadourny (1989, J.Fluid.Mech) strongly support the idea of dissipative geostrophic adjustment