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Dynamics of turbulent western boundary currents at low latitudes, a numerical study

Abstract : Strong western boundary currents are one of dominant features of the world oceans, also at low latitudes. They exhibit a turbulent dynamics and their region is a source of strong kinetic energy production and internal variability of the worlds oceans. Several places exists where the western boundary currents retrofect (i.e separation from the coast) and generate coherent structures as anticyclonic eddies, bursts and dipoles. The dynamics of turbulent western boundary currents has so far not been extensively studied in the viewpoint of turbulent boundary-layer theory. The approach followed in this thesis is to use a fine resolution (2.5km) reduced-gravity shallow water model to understand the turbulent boundary-layer processes and then apply these findings to the Ocean General Circulation Model NEMO in the Drakkar configuration (~10km). The case of the Somali Currentis considered for this application.
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Submitted on : Tuesday, June 27, 2017 - 2:15:14 PM
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  • HAL Id : tel-01548323, version 1



Cataria Quam Cyrille Akuetevi. Dynamics of turbulent western boundary currents at low latitudes, a numerical study. Oceanography. Université de Grenoble, 2014. English. ⟨NNT : 2014GRENU002⟩. ⟨tel-01548323⟩



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