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Accueil du site > Animations Scientifiques > Séminaires 2011 > Jeudi 1er septembre 2011 à 11h, salle A103 (LEGI)

Jeudi 1er septembre 2011 à 11h, salle A103 (LEGI)

Fabien Roquet, Postdoc MIT

Titre/Title : On the Patterns of Wind-Power Input to the Ocean Circulation.

Contact : Julien Le sommer (équipe MEOM).

Résumé/Abstract : Pathways of wind-power input into the ocean general circulation are analyzed using Ekman theory. Direct rates of wind-work can be calculated through the wind stress acting on the surface geostrophic flow. But because that energy is transported laterally in the Ekman layer, the injection into the geostrophic interior is actually controlled by Ekman pumping, with a pattern determined by the wind-curl rather than the wind itself. An interpretation of the wind-power input to the interior is proposed, corresponding to the work done by the Ekman pumping against the surface elevation pressure, helping to maintain the observed anomaly of sea surface height relative to the global-mean sea level.