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| Tartinville, B; Deleersnijder, E; Lazure, Pascal; Proctor, R; Ruddick, Kg; Uittenbogaard, Re. |
| Several coastal ocean models have been used to compute the circulation on the Northwest European Continental Shelf. Five of them, developed within the European Union, are compared in the scope of an idealised three-dimensional test case, dealing with the geostrophic adjustment of a freshwater cylinder. As the central eddy adjusts, unstable baroclinic vortices start to grow. All the models are able to produce such unstable vortices. However, two of them produce an order-two instability, which is in accordance with a previous laboratory experiment, while the others exhibit an order-four instability. Using a simple scaling analysis, it is seen that the azimuthal wavenumber depends on the ratio of the kinetic energy to the available potential energy. It... |
| Tipo: Text |
Palavras-chave: Model intercomparison; Advection; Baroclinic instability; Geostrophic balance. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00448/55938/57485.pdf |
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| Lehucher, Pm; Beautier, L; Chartier, M; Martel, F; Mortier, L; Brehmer, P; Millot, C; Alberola, C; Benzhora, M; Taupierletage, I; Dhieres, Gc; Didelle, H; Gleizon, P; Obaton, D; Crepon, M; Herbaut, C; Madec, G; Speich, S; Nihoul, J; Beckers, Jm; Brasseur, P; Deleersnijder, E; Djenidi, S; Font, J; Castellon, A; Garcialadona, E; Lopezgarcia, Mj; Manriquez, M; Maso, M; Salat, J; Tintore, J; Alonso, S; Gomis, D; Viudez, A; Astraldi, M; Bacciola, D; Borghini, M; Dellamico, F; Galli, C; Lazzoni, E; Gasparini, Gp; Sparnocchia, S; Harzallah, A. |
| The present paper describes the major results obtained from 1989 to 1992 by the EUROMODEL group in studying the circulation in the Western Mediterranean Sea. Particular emphasis has been given to the physical processes responsible for seasonal and mesoscale variabilities. Observations (in situ and satellite), together with theoretical, physical and numerical models, have been widely used in the course of these studies. Attention has been focused on the dynamics of the northern basin (deep water formation, dynamics of the Northern Mediterranean Current, circulation and shelf/slope interaction in the Balearic Sea) and of the southern basin (Alboran Sea circulation, instabilities of the Algerian Current). The straits dynamics have been studied with particular... |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00097/20776/18519.pdf |
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