Approche numérique et expérimentale pour une meilleure description physique des processus de subméso-échelle : Application à la mer Méditerranée nord-occidentale

Abstract : The main objective of this work is to improve our knowledge on the impact of the Northern Current (NC)mesoscale activity off the Var coast on its downstream flow and on the links between this boundary current andthe coastal dynamics, particularly in a semi-enclosed bay and shallow: the bay of Hyères. To do so, twonumerical realistic configurations at high-resolution were used. Based on the NEMO code and nested withAGRIF, the first one covers the French Mediterranean coasts at 1,2 km and the second one covers the Varcoasts with a spatial resolution of 400 m.Simulations comparisons with ocean observations (HF radar, ADCP, glider, satellite SST) confirm therealism of the configurations, and show the contribution of a 400 m spatial resolution on the simulateddynamics in the bay but also on the NC and its downstream flow.Finally, a parametrization study on the horizontal advection terms and vertical mixing provide an improvementof the impact of a downscaling in the studied area, and particularly for the simulated dynamics in the semienclosedbay.
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Amandine Declerck. Approche numérique et expérimentale pour une meilleure description physique des processus de subméso-échelle : Application à la mer Méditerranée nord-occidentale. Océan, Atmosphère. Université de Toulon, 2016. Français. ⟨NNT : 2016TOUL0014⟩. ⟨tel-01546328⟩

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