Séminaire ISTerre

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Mesoscale energy budget in the ocean

jeudi 16 janvier 2020 - 14h00

Bruno Deremble - Institut des Géosciences de l'Environnement (Grenoble)
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The baroclinic instability is fueling the world ocean with eddies. This mecanism is actually the way by which energy is transfered from the large-scale forcing to the meso-scale flow. The question then arises to understand what is the fate of this energy. We try to answer this question with a model of turbulence that is designed to mimic the dynamics of a subtropical gyre. We impose a backround state for which the vertical strucure of the water column vary smoothly in the basin. This flow gives rise to a wide range of instabilities. We show how these variations throughout the gyre is key to understand the transfer of energy to large scales and to small scales.

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Equipe organisatrice : Géodynamo

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères