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The straits of Gibraltar and Kara Gates: a comparison of internal tides ArchiMer
Morozov, Eg; Parrilla-barrera, G; Velarde, Mg; Scherbinin, Ad.
Moored current measurements, numerical model calculations, and satellite images from the straits of Gibraltar and Kara Gates are compared. The vertical internal displacements (double amplitudes) with a semidiurnal frequency are extremely large in both straits. The displacements are related to internal tidal waves over the sills. The energy of the internal tides is transferred to an internal bore and associated wave packets of short-period internal waves. Their surface manifestation can be seen on the satellite images. Numerical modeling shows that the outflowing current from the Mediterranean Sea to the Atlantic Ocean has a significant influence on internal tides. In the Kara Gates, the flow from the Barents Sea to Kara Sea has a similar influence. The...
Tipo: Text Palavras-chave: Marée interne; Télédétection; Détroit de Gibraltar; Mer de Kara; Internal tide; Remote sensing; Strait of Gibraltar; Kara Sea.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00322/43269/43000.pdf
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A numerical study of the generation and propagation of internal solitary waves in the Luzon Strait ArchiMer
Cai, Sq; Long, Xm; Gan, Zj.
A new composite model, which consists of a generation model of the internal tides and a regularized long wave propagation model, is presented to study the generation and evolution of internal solitary waves in the sill strait. Internal bores in the sill strait are first simulated by the generation model. and then the internal tidal field outside of the sill region is given as input for the propagation model. Numerical experiments are carried out to Study the imposing tide, depth profile. channel width and shoaling effect, etc., on the generation and evolution of internal solitary waves. It is shown that only when the amplitude of internal tide at the forcing boundary of the propagation model is large enough that a train of internal solitary waves would be...
Tipo: Text Palavras-chave: Marée interne; Modèle numérique de soliton; Mer de Chine; Internal wave; Soliton; Numerical model; South China Sea.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00322/43319/42935.pdf
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