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     <dc:title xml:lang="fr">Étude de l’impact des interactions entre ondes de marée interne et circulation basse fréquence sur le budget énergétique de la marée interne à l’aide d’une simulation numérique à haute résolution sur l’Atlantique Nord</dc:title>
     <dcterms:alternative xml:lang="en">Study of the impact of interactions between the internal tides and the slowly varying circulation on the energy budget of the internal tide over the Norh Atlantic, using a high-resolution realistic simulation</dcterms:alternative>
     <dc:subject xml:lang="fr">Marée interne</dc:subject><dc:subject xml:lang="fr">budget énergétique</dc:subject><dc:subject xml:lang="fr">interaction ondes circulation basses fréquences</dc:subject><dc:subject xml:lang="fr">simulation numérique</dc:subject><dc:subject xml:lang="fr">incohérence</dc:subject>
     <dc:subject xml:lang="en">Internal tide</dc:subject><dc:subject xml:lang="en">energetic budget</dc:subject><dc:subject xml:lang="en">waves/low frequency currents interractions</dc:subject><dc:subject xml:lang="en">numerical simulation</dc:subject><dc:subject xml:lang="en">incoherence</dc:subject>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="234745649">Marées internes</tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Dans cette thèse, le cycle de vie de la marée interne et sa perte de cohérence par ses interactions avec les courants sont étudiés dans l’Atlantique Nord à l’aide d’une simulation d’un océan réaliste à haute résolution. Une décomposition en mode verticaux est utilisée pour obtenir le budget d’énergie des différentes échelles de la marée interne. La dispersion topographique est dominante à l’échelle du bassin et aux niveaux des reliefs, tandis que les interactions entre la marée interne et la circulation basse fréquence signent au niveau du Gulf Stream, de son prolongement Nord Atlantique et dans le Nord du Bassin. Enfin, une décomposition en partie cohérente/incohérente est utilisée. Les causes de la perte de cohérence de la marée sur des échelles de un à trois mois sont l’advection de la marée interne par l’écoulement lentement variable et le cisaillement horizontal de ce dernier. Cette perte de cohérence se fait majoritairement sans changement d’échelle pour la marée.</dcterms:abstract>
     <dcterms:abstract xml:lang="en">The life cycle of the internal tide and its loss of coherence due to its interactions with currents are studied over the North Atlantic basin using a high-resolution simulation of a realistic ocean. A vertical mode decomposition is used to obtain the energy budget of the different scales of the internal tide. Topographic scattering is dominant at the basin scale and around topographic features, while interactions between the internal tide and the low-frequency circulation are significant in the Gulf Stream, its North Atlantic extension and in the northern part of the basin. Finally, a coherent/incoherent decomposition is used. The causes of the internal tide loss of coherence on scales of one to three months are the advection of the internal tide by the slowly varying current and the horizontal shear of the latter. Most of this loss of coherence occurs without any change of scale for the internal tide.</dcterms:abstract>
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       <tef:nom>Bella</tef:nom>
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