A Statistical Equilibrium Model of Zonal Shears and Embedded Vortices in a Jovian Atmosphere
A prominent feature of two-dimensional and quasi-geostrophic turbulence is the formation of large-scale coherent structures among the smallscale fluctuations of the vorticity field. This separation-of-scales behavior is a consequence of the conservation of both energy and enstrophy by the dynamics, which results in a net flux of energy toward large scales and a net flux of enstrophy toward small scales. Many flows of this kind, whether free-decaying flows or weakly driven, can therefore be described approximately as coherent, deterministic structures on the large scales and disorganized, random motions on the small scales.
KeywordsEntropy Vortex Manifold Vorticity Advection
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