Numerical studies of small-scale forced, two-dimensional turbulent flows on the surface of a rotating sphere have revealed strong large-scale anisotropization that culminates in the emergence of quasi-steady sets of alternating zonal jets, or zonation. The kinetic energy spectrum of such flows also becomes strongly anisotropic. For the zonal modes, a steep spectral distribution, E(n)=Cz(Ω/R)^2 n^-5, is established, where Cz=0(1) is a non-dimensional coefficient, Ω is the angular velocity, and...Expand abstract
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- Citation: Galperin, B. et al. (2006). 'Anisotropic turbulence and zonal jets in rotating flows with a β-effect', Nonlinear Processes in Geophysics, 13, 83-98. [Available at http://www.nonlin-processes-geophys.net/13/83/2006/]. © B. Galperin et al. 2006. This article is distributed under the terms of the Creative Commons Attribution, NonCommercial and ShareAlike License (http://creativecommons.org/licenses/by-nc-sa/2.0/deed.en). This permits the copying and distribution of the work, and the making of derivative works, provided the original authors are credited. However, you may not use this work for commercial purposes, and if you alter, transform, or build upon this work, you must distribute the resulting work under a license identical to this one. For any reuse or distribution, you must make clear to others the license terms of this work. These conditions may be waived if you get permission from the copyright holder and, in the case of commercial use during the first five years, you also get permission from Copernicus Publications and the European Geosciences Union.
Anisotropic turbulence and zonal jets in rotating flows with a β-effect
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