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VOLUME 59 (1994) | ISSUE 3 | PAGE 155
Sustenance of vortex structures in a rotating fluid layer heated from below
A system of thermohydrodynamic equations describing the evolution of large-scale pertubations in a rapidly rotating layer of fluid, heated from below, is analyzed in the Boussinesq approximation. The incorporation of viscosity, the deformation of the free upper surface, and the heating leads to new terms in the equation. These new terms represent positive and negative diffusion. One solution of the equation corresponds to localized Rossby vortices. There is an amplitude increase for perturbations of sufficiently large scale. A quasisteady solution is derived for a nonlinear ID equation by numerical calculations.