Accueil > Actualités > Séminaires > Séminaire de Jim McWilliams au LOCEAN


Titre : Submesoscale Currents in the Ocean
Nom du conférencier : Jim McWilliams
Son affiliation : UCLA
Laboratoire organisateur : LOCEAN
Date et heure : 19-05-2016 14h00
Lieu : Campus de Jussieu, salle de réunion du LOCEAN, tour 45/55, 4eme étage
Résumé :

This talk will offer a perspective on the recently discovered realm of submesoscale currents  in  the  ocean.   They  are  intermediate-scale  flow  structures  in  the  form  of  density fronts and filaments,  topographic wakes,  and persistent coherent vortices at the surface and throughout the interior.  They are created from mesoscale eddies and strong currents, and they provide a dynamical conduit for energy transfer toward microscale dissipation and diapycnal mixing. Consideration is given to their generation mechanisms, instabilities, life-cycles, disruption of approximately diagnostic force balance (e.g., geostrophy), turbulent cascades, internal-wave interactions, and transport and dispersion of materials.  At a fundamental level more questions remain than answers, implicating a program for further research.