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MENOR/MARS3D : un outil de Recherche et de Prévision
opérationnelle en Méditerranée sur Caparmor»
Pierre Garreau
Valérie Garnier, Tina Odoka, Gael Andre, Mathieu Jouan ....
Ifremer Centre de [email protected]
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Challenges
Modelling the North Current dynamics (density driven current)
Modelling the dense water formation on the shelf off the Gulf of Lion
Simulate the behaviour of the Rhône plume
Modelling upwellings (generation and relaxation)
Modelling the seasonal patterns of the circulation
Build a robust configuration (daily run)
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Building A chain of nested model
Regional model l (resolution about 1km), using ogcm results (MERCATOR of MFS) to force at the open boudaries
Understand the regional circulation.
Recruitement of fishes
Transportation of larvae..;
Coastal Model (resolution 400m).
Small scales process
Local model (resolution < 150m)
Impact of seawage release or fish farming
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CONSTRUCTION DE LA CONFIGURATION
�The domain extension ?
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Choose a configuration
�The size of the cell ?
�The vertical resolution ?
�The Time step ?
•Radius of deformation in the North current is about 4-5 km• The Rhone plume (buoyancy forcing ) need high resolution.•Simulation upwelling filaments is expected
-> DX , DY 1.2 km
•Shelf of the Gulf of Lion (100 m deep).•Taken into account the shelf break.•Sufficiently fine vertical resolution near the surace to describe the seasonnal thermocline.
–30 « sigma coordinate » levels refined near the surfa ce and near the bottom
DT < DX/U � DT<1200m/(2m/s) 600s -> 150-300s
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Open Boundaries conditionsInitial conditions
Mars3D codeResolution 1. km30 Sigma level Time step Dt=300s
Open Boundary conditions - temperature and salinity are prescribed.-Sea surface heigth
-Embeded in Mercator or MFS OGCM (resolution about 5-7 km) - velocities
),()1(),(),( ttxxtxtx prognosticprescribed ∆−∆+−+= ηααηη
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Improving the meteorological forcingusing MM5
-MM5 code- ACRI-ST- spatial resolution 3 km.- The modelled sea surface temperature is taken into account trough bulk formulae-Next step will be a full interaction between the sea and the atmosphere
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Modelling the North Currentdynamics
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Modelling the North Currentdynamics
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Modelling the seasonal variation of the North Current
Flux through the Corsica Channel
1.2 Sv
Less than 0.1SvCan reverse
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Modelling the North Currentdynamics
At the end of Winter the ECC is strong.
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Modelling the North Currentdynamics
Late Spring :WCC andECC merges in Ligurian Sea.
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Modelling the North Currentdynamics
In Autumn : ECC vanishes
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Lagrangian floats
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15 mai 2008Lagrangian floats
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UTILISATION OPERATIONNELLE
dayly products :-1 day hindcast + 3 days forecast of meteorological forcing (high résolution MM5 model using NCEP for initial and boundary Condition) - 1day hindcast + 3 day forecast of the North-Western of the Mediterranéan Sea
- http://www.previmer.org
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Projet SARDONETransport des oeufs et larves d’Anchois
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Projet SARDONETransport des oeufs et larves d’Anchois
ichthyop (IRD ; ifremer/previmer)
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Projet SARDONETransport des oeufs et larves d’Anchois
ichthyop (IRD ; ifremer/previmer)
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choix de la zone par simple click dans googleMap
FastMars
- Corse
- Mer ligure
- Golfe de Gêne
- Golfe du Lion
- Mer catalane
- …
PROJET CLARAIIPollution chimique en Mer
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Choix du point de rejet par simple click ou par
ses coordonnées géographiques
PROJET CLARAIIPollution chimique en Mer
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Rejet 08-Mars-2007Rejet urbain de Marseille (Cortiou) – Modélisation Off-line
Traceur dissous particules
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Merci Caparmor…
�MENOR est une grosse configuation (1100*460*30) �Qui est utilisée sur plusieurs projets de recherches
ou d’application.
�Qui tourne en MPI… grâce au support de Tina Odaka.
�Qui sera gourmande en CPU (assimilation utilisant une méthode d’ensemble)
�Qui pourrait être interressé par PALM (couplage avec la biologie, la houle)
