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Registros recuperados: 5
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La circulation des eaux en Baie de Seine ArchiMer
Chabertd'Hieres, G.
In a joint work several laboratories have attempted to research coherent results on water mass circulation in Seine Bay. The main focus of their research is the measurement and the calculation of instantaneous currents and the study of their temporal and geographical variations, not only to know these currents, but, also to determinate the short or long-term development of water masses. In this report the author comments and presents the notions which have been drawn from this work.
Tipo: Text Palavras-chave: Current measurement; Current prediction; Water masses; Water circulation.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1256.pdf
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Courantometrie en Baie de Seine: Comparaison d''une modelisation numerique et de mesures par radar ArchiMer
Broche, P; Salomon, J; Maistre (de), J; Devenon, J.
2-D models of tide currents are the most used to obtain a description of the circulation in coastal zones, from initial conditions in this area, and limit conditions (depth water). The lack of precision in open limits and the approximation of mathematical calculation, involve the validation of these models with the use of coherent decametric radar. This report deals with a comparative study.
Tipo: Text Palavras-chave: Comparative studies; Mathematical models; Current prediction; Radar; Current data.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1261.pdf
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Courantologie calculee en Baie de Seine ArchiMer
Salomon, J.
The movement of water particles in the ocean and littoral zone can be thought of as the result of elementary components superimposed, of which tidal flow is the main factor. Hydrodynamical equations show that these movements are more coupled in the coastal zone than in deep ocean. This characteristic is the result of current intensity, spatial gradients and bottom topography (depth). In the coastal environment tidal flow must be taken into account to study dynamic processes. The tide is not only an alternative movement but is the inducer of a long term current: the residual current. The author uses a bidimensional model to study currents from the depth and vertical structure of residual currents by the effect of density variations.
Tipo: Text Palavras-chave: Density gradients; Mathematical models; Current prediction; Residual flow; Tidal currents; Lagrangian current measurement; Water circulation.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1258.pdf
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Sur l'hydrodynamique de la Baie de Seine. Resultats d''observations et de modelisations ArchiMer
Leprovost, C; Fornerino, M; Villaret, C.
Study of Seine bay hydrodynamics can't be separated from the Channel and continental shelf. The authors' modellings are aimed at the study of this global ladder and the insertion of coastal areas such as the Seine Bay in this context. Two 2-D models are used. One covers only the Channel, and the other from Pas-de-Calais to continental shelf limits including Celtic sea, Channel and southern North Sea. The results are comparated with long time current observations.
Tipo: Text Palavras-chave: Current data; Mathematical models; Modelling; Tidal currents; Current prediction; Water circulation; Hydrodynamics.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1259.pdf
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Observations de courant en Baie de Seine ArchiMer
Lehir, P; L'Yavanc, J.
Results of long-term current measurements in the Seine Bay are presented: (1) tidal flow and propagation of the tide across the bay; (2) ability to predict tidal currents from previous measurements by the means of harmonic analysis; (3) identification of residual flow factors according to a principal component analysis in a complex space; (4) description of the tidal residual flow with large eddies; (5) demonstration of wind effects on currents.
Tipo: Text Palavras-chave: Meteorological observations; Mathematical models; Long term records; Residual flow; Current prediction; Tidal currents; Water circulation; Current observations.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1257.pdf
Registros recuperados: 5
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