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Jets, vortex et ondes d'inertie-gravité: séparation dynamique et émission

Abstract : Nonlinear geostrophic adjustment of rectilinear jets is examined analytically. It is shown that the Lagrangian formalism is best suited to describe unambiguously the splitting between a balanced part and a fast, gravity wave part of the flow. Modifications to the standard scenario of geostrophic adjustment are highlighted.

Data analysis of FASTEX radiosoundings is carried out to show that atmospheric jets and fronts are a significant source of inertia-gravity waves.

A mechanism for the radiation of gravity waves from non-stationary vortical motions is illustrated theoretically by considering the waves excited by an ellipsoidal vortex in a stratified fluid.
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Contributor : Riwal Plougonven <>
Submitted on : Tuesday, March 14, 2006 - 9:10:53 AM
Last modification on : Monday, December 14, 2020 - 9:51:10 AM
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  • HAL Id : tel-00011940, version 1


Riwal Plougonven. Jets, vortex et ondes d'inertie-gravité: séparation dynamique et émission. Océan, Atmosphère. Université Pierre et Marie Curie - Paris VI, 2002. Français. ⟨tel-00011940⟩



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