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Article Dans Une Revue Theoretical and Computational Fluid Dynamics Année : 2010

Explosive instability of geostrophic vortices. Part 1: baroclinic instability

Résumé

In a quasi-geostrophic model, we study the baroclinic instability of a two-layer vortex. The singular unstable modes for potential vorticity anomalies are compared with the classical normal modes. Short-time singular modes are explosively unstable and, at short times, depend only on the baroclinic component of the flow. As time progresses, they evolve towards the normal modes and their sensitivity to flow parameters is explored. Asymptotic solutions are provided.
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Dates et versions

hal-00494144 , version 1 (05-02-2024)

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Xavier J. Carton, Glenn R. Flierl, Xavier Perrot, Thomas Meunier, Mikhail A. Sokolovskiy. Explosive instability of geostrophic vortices. Part 1: baroclinic instability. Theoretical and Computational Fluid Dynamics, 2010, 24 (1-4), pp.125-130. ⟨10.1007/s00162-009-0140-7⟩. ⟨hal-00494144⟩
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