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| Registros recuperados: 21 | |
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| Ellien, C; Thiebaut, E; Dumas, Franck; Salomon, Jean-claude; Nival, Paul. |
| The dispersal of Pectinaria koreni larvae released from the eastern Bay of Seine (English Channel) was studied using a two-dimensional hydrodynamic model which integrates tides, wind-driven currents and eddy diffusion, in order to examine the influence of environmental forcing and mortality on larval population dynamics. A broad agreement between predicted larval dispersal for two spawning events observed in 1987 and field data suggests that numerical modelling may be useful to analyse processes involved in the transport and the dynamics of larval populations. Larval mortality may be as important as hydrodynamic processes on larval losses for the adult population. Tides and eddy diffusion had some effects on larval dispersal, but wind forcing and the... |
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| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00000/10747/7641.pdf |
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| Lazure, Pascal; Salomon, Jean-claude. |
| The hydrodynamics of coastal zones often reflect the combined action of tides, winds and density differences. Usual two-dimensional numerical models are only partly suited to the study of such mechanisms. A set of two 2-D and 3-D numerical models is described here. Its main characteristics are: an automatic coupling, a specific procedure for shoaling banks, a reduced vertical coordinate system, and a resolution by finite differences. As an example, the complete set is applied to the region of the Loire and Vilaine estuaries in South Brittany (France). Results prove to be coherent with experimental data and enhance our knowledge of the local hydrodynamics. |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00101/21248/18862.pdf |
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| Salomon, Jean-claude; Breton, Marguerite. |
| A two-dimensional mathematical model of the Channel has been used to reveal tide-related advective physical structures, at synoptic time scales. Results show a complete circulation pattern composed of a nearly axial "river" carrying a water flux of about 27,000 m super(3)/s, for an average tide, from the Atlantic to the North Sea and lateral gyres of various intensities, linked to the topography. The modest velocity of the mean flow makes it probably subject to strong temporal modifications by meteorological forcings. Conversely, some strong gyres may play an important role on the residence time of particles and the local memorization of water mass characteristics. |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00268/37883/35964.pdf |
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| Breton, Marguerite; Caprais, Marie-paule; Derrien, A.; Douillet, P; Dubois, E; Dupray, E; Gourmelon, Michele; Guillerm, Denise; Kempf, Marc; Lazure, P.; Le Guyader, Soizick; Le Menn, Remi; Menard, Dominique; Pommepuy, Monique; Salomon, Jean-claude. |
| Les départements et territoires d'outre mer sont généralement l'objet d'enjeux économiques importants, et de conflits d'activités liés au développement touristique, aquacole, agricole et industriel. Les études font généralement état d'une lente dégradation de l'environnement marin avec diminution des coraux et de la faune associée, au profit d'une augmentation de la couverture algale. On constate parfois un envasement ou un ensablement des sites, la présence dans l'eau de polluants organiques, dont des pesticides, des métaux ainsi que des microorganismes d'origine fécale. En Martinique, ce dernier aspect, lié à l'assainissement des zones rurales, urbaines et touristiques est actuellement considéré comme une préoccupation majeure pour les prochaines années.... |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00132/24303/22301.pdf |
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| Salomon, Jean-claude; Le Hir, Pierre. |
| Les zones côtières, et les estuaires en particulier, fournissent au bien-être de l'homme et à son activité économique une aide très appréciable. Contrairement au milieu terrestre pauvre en eau, et au milieu marin pauvre en éléments nutritifs, les estuaires riches de ces deux constituants sont un lieu de vie privilégié. On connait le rôle de frayère et de nurserie qu'ils jouent pour de très nombreuses espèces. Ces estuaires sont actuellement utilisés comme collecteurs des rejets industriels et domestiques. Bien que ces rejets lorsqu'ils sont convenablement traités et dilués ne soient pas obligatoirement néfastes, il est de première utilité de pouvoir juger de leurs effets selon leur nature, leur localisation et leur importance, pour ne pas mettre en danger... |
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| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00105/21638/19219.pdf |
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| Pommepuy, M.; Manaud, F.; Monbet, Y.; Allen, G.; Salomon, Jean-claude; Gentien, P.; L''Yavang, J.. |
| An oceanographic survey of the bay of Brest (France) was conducted in 1977, together with an hydrological study of the rivers entering the bay. Samples were collected from rivers. Analysis of dissolved nutrients (nitrate, phosphate, ammonium, reactive silicate) and tentative solute budjets (observed and calculated) for nitrogen and phosphorous in drainage basin were performed. |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/1979/publication-6014.pdf |
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| Lazure, Pascal; Salomon, Jean-claude. |
| The marine circulation between Quiberon and Noirmoutier is due to the combined effects of the tides, winds and density circulation induced by the discharges of the Vilaine and Loire rivers. These effects have been studied with two mathematical models, a two-dimensional (vertically integrated) one and a three-dimensional one. The tide has been shown to be the most important phenomenon at short time scale. Its effects are locally variable mainly because of topographic control. The tidal influence decreases significantly at long time scale and the residual circulation depends mainly on meteorological and hydrological conditions. The wind-induced circulation is mostly three-dimensional and appears locally to be the main dynamic process. During high flood, the... |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00245/35578/34111.pdf |
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| Bailly Du Bois, Pascal; Rozet, M; Thoral, K; Salomon, Jean-claude. |
| New tools are now available to make more accurate deteminations of radio-tracer distribution : - Repositioning of station locations at the same tide reference-time, giving a homogeneous spatial data set, coupled with the possibility of interpolating and quantifying the amounts of dissolved radioactivity flowing through the English Channel. - The first measurements of tritium (3H) in seawater on a large scale in the English Channel demonstrate that this fully conservative radionuclide is a clearly identifiable marker of industrial releases. Recent campaigns carried out during the FluxManche II CCE (1994) programme show the general distribution of dissolved radionuclides 137Cs, 134Cs, 125Sb and 3H in the English Channel and Irish Sea. The re-utilization of... |
| Tipo: Text |
Palavras-chave: English channel; Tritium; Radioactive tracer; Watre mass circulation. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/acte-559.pdf |
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| Thouvenin, Benedicte; Salomon, Jean-claude. |
| In order to reproduce and investigate the marine circulation in the coastal tidal zone, and especially its three dimensional nature, it appeared interesting to develop a numerical mode! which could take account of the real bottom topography and the variations of the free surface. Navier-Stokes equations are solved in a straight forward manner, generalizing a finite difference technique already used in two-dimensional vertical models. To test the computational program, the mode! was applied to a number of flat bottom schematic basins, where we reproduced wind driven currents and tide propagation. Then we considered the particular case of a real channel and, finally, density currents associated with a salty wall. Mode) results are compared to theoretical... |
| Tipo: Text |
Palavras-chave: Modèle; Courant; Tridimensionnel; Seine; Côtier; Model; Current; Three-dimensional; Seine; Coastal. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/00113/22440/20127.pdf |
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| Loubersac, Lionel; Salomon, Jean-claude; Breton, Marguerite; Durand, Christophe; Gaudineau, Caroline. |
| This paper presents a set of solutions based on the synergy between GIS and a numerical model to help in diagnosis and decision making for water quality related matters. After an overview of the model features, it describes the computer interface (ModelView) implemented as an extension of the Arc View (ESRI) GIS System to provide operational data communication between the model and the GIS in vector or raster form. The paper particularly focuses on changes in the quality of coastal waters from river discharges. It looks at the spatio-temporal representation of this behaviour and the spatial analysis of sensitive areas that can be impacted. Examples are given of a French coastal area subject to strong human pressure, i.e. marine cultures and recreational... |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00189/30011/28492.pdf |
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| Lafite, Robert; Shimwell, Susan; Grochowski, Nicolas; Dupont, Jacques; Nash, Linda; Salomon, Jean-claude; Cabioch, Louis; Collins, Michael; Gao, Shu. |
| Suspended Particulate Matter (SPM) concentrations at various levels within the water column, together with salinity and temperature, were measured using water samples collected from six stations across the Straits of Dover. The sampling programme covered a 16-month period, undertaken during 23 cruises. On the basis of the spatial variability in the concentrations, the water bodies are divided by several boundaries, controlled by tidal and wind conditions. Within the water column, SPM concentrations were higher near the sea bed than in the surface waters. Throughout the cross-section, maximum concentrations occurred adjacent to the coastlines. Temporal variability in the SPM concentration exists on daily and seasonal scales within the coastal waters (4.2 to... |
| Tipo: Text |
Palavras-chave: English Channel; Straits; Transport mechanisms; Flux; Suspended particulate matter; Manche; Détroit; Mécanismes de transport; Flux; Matières en suspension. |
| Ano: 2000 |
URL: https://archimer.ifremer.fr/doc/2000/publication-527.pdf |
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| Registros recuperados: 21 | |
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