References of "Nihoul, Jacques"
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See detailSensitivity of the Black Sea's ecosystem to physical processes. First results of a high resolution 3D interdisciplinary model
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Nihoul, Jacques ULg et al

in Supplement to EOS Transactions - American Geophysical Union meeting du 9 au 13 février 1998 (1998)

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See detailSimulation of the annual plankton productivity cycle in the Black Sea with a 3D high resolution interdisciplinary model
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Nihoul, Jacques ULg et al

in Papailiou, K.D.; Tsahalis, D.; Periaux, J. (Eds.) et al Proceedings of the 4th European Computational Fluid Dynamics Conference (ECCOMAS) (1998)

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See detailCoupled physical, chemical and biological models
Nihoul, Jacques ULg; Djenidi, Salim ULg

in Brink, Kenneth H.; Robinson, Allan R. (Eds.) The Global Coastal Ocean, Processes and Methods (1998)

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See detailInterdisciplinary approach and data assimilation in a Mediterranean ecosystem model
Lacroix, Geneviève; Djenidi, Salim ULg; Nihoul, Jacques ULg et al

in EOS Transactions (1998), 79

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See detailRecent developments and trends in modelling the coastal/shelf environment
Djenidi, Salim ULg; Nihoul, Jacques ULg

in Lee, S.-C.; Hiew, K.-L.; Ong, S.-H. (Eds.) Hydraulic Research and Engineering Towards and Beyond 2000 (1998)

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See detailReconnaissance of the main Black Sea's ecohydrodynamics by means of a 3D interdisciplinary model
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Nihoul, Jacques ULg et al

in Journal of Marine Systems (1998), 16(1-2), 85-105

A 3D interdisciplinary model has been used to test the sensitivity of the Black Sea’s ecosystem to physical processes. The hydrodynamical model of the general circulation has been built up, using the GHER ... [more ▼]

A 3D interdisciplinary model has been used to test the sensitivity of the Black Sea’s ecosystem to physical processes. The hydrodynamical model of the general circulation has been built up, using the GHER primitive equation model. A model with 15 km horizontal resolution and 25 vertical levels is used to compute the typical seasonal cycle. The model is forced by climatological monthly mean fields of temperature, salinity and wind stress at the air–sea interface; the river discharges of the Danube, Dnestr and Dnepr are taken into account. An ecosystem model at basin scale is then defined by a nitrogen cycle considering several phytoplankton and zooplankton sizes and including the microbial loop. The ecosystem model is embedded on-line into the 3D hydrodynamical model with a superimposed cycle for the light intensity. This model must be regarded rather as a first tool for testing the coupling of hydrodynamic and ecosystem submodels, while acquiring some preparatory assessment of the effect of physical processes on the ecodynamics. The results display a highly three-dimensional aspect with important horizontal and vertical variations, obviously imparted to the system by the physical processes horizontal and vertical advection, vertical mixing and diffusion, upwelling associated with light limitation at depth and sinking of dead organisms. In this paper, the results are described emphasizing the effects of the hydrodynamic constraints on the space–time distribution of the primary and secondary production. [less ▲]

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See detailPreliminary study of the Black Sea's plankton bloom
Grégoire, Marilaure ULg; Nihoul, Jacques ULg

in Report of the Second meeting of the international Gobec Numerical Modelling Working Group (1997)

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See detailProcesses in regions of freshwater influence (ROFI)
Nihoul, Jacques ULg; Djenidi, Salim ULg; Huthnance, J. M. et al

in Journal of Marine Systems (1997), 12(1-4), 1-2

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See detailCirculation of the western Mediterranean: From global to regional scales
Beckers, Jean-Marie ULg; Brasseur, P.; Nihoul, Jacques ULg

in Deep-Sea Research Part II, Topical Studies in Oceanography (1997), 44(3-4), 531-549

A free-surface, three-dimensional, primitive equation model has been implemented with a horizontal resolution of 4.6 km to study the ocean circulation in the Gulf of Lions at time scales ranging from ... [more ▼]

A free-surface, three-dimensional, primitive equation model has been implemented with a horizontal resolution of 4.6 km to study the ocean circulation in the Gulf of Lions at time scales ranging from weeks to seasons. Numerical experiments have been conducted, in which the regional model is nested into a basin-scale model of the whole western Mediterranean. The global model is operated with a relatively coarse resolution (16 km) and provides boundary conditions at the open-sea boundaries of the regional domain. There is, however, no Feedback loop from the regional to the global model. The simulations are consistently driven with atmospheric fluxes computed from the output of the French PERIDOT meteorological forecasting system, between August 1988 and 1989. In addition to the initial conditions, in situ measurements of temperature and salinity are assimilated in the simulation of the general circulation, adopting a simple nudging technique to prevent an excessive drift of the model against climatology. The response of the regional model below and above the thermocline is discussed in the context of the prevailing meteorological situations. Some experiments give indications that a double-gyre system may develop from wind regimes that exhibit a cyclonic/anticyclonic wind stress curl. Advection-diffusion of passive tracers are also examined on the basis of the local hydrodynamic features, because this work has been conceived with the aim of determining the physical conditions in which ecological and biochemical processes develop at the interface between river mouths and the open ocean. (C) 1997 Elsevier Science Ltd. [less ▲]

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See detailCoupled Hydrodynamic Ecosystem model of the Black Sea at basin scale. First results.
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Nihoul, Jacques ULg et al

in Ozsoy, Emin; Mikaelyan, Alexander (Eds.) Sensitivity to change : Black Sea, Baltic Sea and North Sea (1997)

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See detailModelling the competition between two phytoplanktonic species
Elkafazi, Abderahman; Djenidi, Salim ULg; Nihoul, Jacques ULg

in Bulletin de la Société Royale des Sciences de Liège (1996), 65

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See detailMécanique Rationnelle - Modèle Mathématique de Newton
Delhez, Eric ULg; Nihoul, Jacques ULg

Book published by Etienne Riga (1996)

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See detailModelling the North Sea hydrodynamics in a management perspective
Djenidi, Salim ULg; Delhez, Eric ULg; Martin, Géraldine ULg et al

in Bulletin de la Société Royale des Sciences de Liège (1996), 65

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See detailPreliminary study of the Black Sea's plankton bloom
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Nihoul, Jacques ULg et al

in Bulletin de la Société Royale des Sciences de Liège (1996), 65(1), 91-94

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See detailProgress from 1989 to 1992 in understanding the circulation of the Western Mediterranean Sea
Lehucher, P. M.; Beautier, L.; Chartier, M. et al

in Oceanologica Acta (1995), 18(2), 255-271

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 ... [more ▼]

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 reference to the Corsica channel. Preliminary runs of a basin-scale circulation model of the Western Mediterranean Sea forced by the straits are also presented. They are shown to be capable of generating a cyclonic circulation in the western basin. [less ▲]

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See detailA simple two species ecological model exhibiting chaotic behaviour
Beckers, Jean-Marie ULg; Nihoul, Jacques ULg

in Mathematical & Computer Modelling (1995), 21(6), 3-11

The classical prey-predator model of Lotka-Volterra is revisited. Instead of constant growth rates, a modulated growth rate for the prey is used. It is shown that in this very simple case, the resulting ... [more ▼]

The classical prey-predator model of Lotka-Volterra is revisited. Instead of constant growth rates, a modulated growth rate for the prey is used. It is shown that in this very simple case, the resulting system's evolution may become nonlinearly resonant. This shows that complex behaviour is not necessarily related to complex systems. [less ▲]

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See detailThe hydrodynamics of the Western Mediterranean Sea
Euromodel group; Nihoul, Jacques ULg; Beckers, Jean-Marie ULg et al

Report (1995)

Euromodel is devoted to process studies in relation to the description, understanding and simulation of the seasonal and mesoscale variability of the general circulation of the Western Mediterranean. Deep ... [more ▼]

Euromodel is devoted to process studies in relation to the description, understanding and simulation of the seasonal and mesoscale variability of the general circulation of the Western Mediterranean. Deep water formation drives the large cyclonic gyre observed in the northern basin. Some seasonal and mesoscale characteristics of the Northern, Tyrrhenian and Western Corsican Currents are specifies. The flow throuch the strait of Gibraltar is not hydraulically controlled. Potential vorticity conservation and changes in the meridional pressure gradients explain the formation of the western Alboran Sea gyre. Cyclonic eddies at its periphery are observed and modelled. The Almeria-Oran jet-front system is described in terms of geostrophic adjustment of Modified Atlantic Water and Mediterranean Water. Algerian eddies are linked to baroclinic instability of the current. A cyclonic circulation around the continental slope in the whole western basin is observed at depth. Upper ocean mesoscale variability is related to downward penetration of near-inertial motions as observed near the Catalan front. In the Balearic Sea, spatial and temporal variability of two shelf / slope fronts influences the large scale dynamics. The MAST 1 phase of Euromodel, initiales a numerical simulation of the Western Mediterranean : the sole forcing by the density gradients throuh the straites of Gibraltar and Sicily quaalitatively reproduces the basin scale cycloni surface and intermediate flows and the coastal currents. [less ▲]

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