Rossby-wave turbulence in a rapidly rotating sphere - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nonlinear Processes in Geophysics Année : 2005

Rossby-wave turbulence in a rapidly rotating sphere

Résumé

We use a quasi-geostrophic numerical model to study the turbulence of rotating flows in a sphere, with realistic Ekman friction and bulk viscous dissipation. The forcing is caused by the destabilization of an axisymmetric Stewartson shear layer, generated by differential rotation, resulting in a forcing at rather large scales.
The equilibrium regime is strongly anisotropic and inhomogeneous but exhibits a steep m-5 spectrum in the azimuthal (periodic) direction, at scales smaller than the injection scale. This spectrum has been proposed by Rhines for a Rossby wave turbulence. For some parameter range, we observe a turbulent flow dominated by a large scale vortex located in the shear layer, reminding us of the Great Red Spot of Jupiter.
Fichier principal
Vignette du fichier
npg-12-947-2005.pdf (1.95 Mo) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-00331087 , version 1 (18-06-2008)

Identifiants

Citer

N. Schaeffer, P. Cardin. Rossby-wave turbulence in a rapidly rotating sphere. Nonlinear Processes in Geophysics, 2005, 12 (6), pp.947-953. ⟨10.5194/npg-12-947-2005⟩. ⟨hal-00331087⟩
230 Consultations
208 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More