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Scale Oriented Embedded Modeling of the North-western Mediterranean in the Frame of Mfstep : Volume 4, Issue 1 (12/02/2007)

By Estournel, C.

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Book Id: WPLBN0004020990
Format Type: PDF Article :
File Size: Pages 43
Reproduction Date: 2015

Title: Scale Oriented Embedded Modeling of the North-western Mediterranean in the Frame of Mfstep : Volume 4, Issue 1 (12/02/2007)  
Author: Estournel, C.
Volume: Vol. 4, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Marsaleix, P., Estournel, C., Lux, M., Auclair, F., & Nguyen, C. (2007). Scale Oriented Embedded Modeling of the North-western Mediterranean in the Frame of Mfstep : Volume 4, Issue 1 (12/02/2007). Retrieved from http://www.worldlibrary.net/


Description
Description: Pôle d'Océanographie Côtière de Toulouse – Laboratoire d'Aérologie, Toulouse, France. An embedded forecasting system was developed for the North-Western Mediterranean including a regional model and a coastal model of the Gulf of Lion. The system is based on the Symphonie hydrodynamic free surface model and on the variational initialization and forcing platform VIFOP. It was shown that a pre-modeling period of 7 days before beginning the forecast allows the growth of the small scales. The embedded forecasts have been compared to the MFS observing system. It was basically found that in the North-Western Mediterranean, the MFS basin-scale model and thus the regional model forecasts are characterized by large negative biases of salinity in the first 100 m under the surface leading thus to too light subsurface waters. The underestimation of temperature by the regional model just below the surface and its overestimation at 30 m deep can be associated to an overestimation of the turbulent mixing. The regional and coastal models allow to represent a number of processes especially those induced by the wind as coastal upwelling under stratified conditions, dense water formation over the Gulf of Lion shelf, deep mixing in the convection zone or influence on the Northern Current penetration in the Gulf of Lion.

Summary
Scale oriented embedded modeling of the North-Western Mediterranean in the frame of MFSTEP

Excerpt
Auclair, F., Casitas, S., and Marsaleix, P.: Application of an inverse method to coastal modelling, J. Atmos. Oceanic Technol., 17, 1368–1391, 2000b.; Adcroft, A., Hill, C., and Marshall, J.: Representation of Topography by Shaved Cells in a Height Coordinate Ocean Model, Monthly Weather Rev., 125, 9, 2293–2315, 1997.; Auclair, F., Marsaleix, P., and Estournel, C.: Sigma coordinate pressure gradient errors : evaluation and reduction by an inverse method, J. Atmos. Oceanic Technol., 17, 1348–1367, 2000a.; Auclair, F., Marsaleix, P., and Estournel, C.: The penetration of the northern current over the Gulf of Lion (western Mediterranean Sea) as a downscaling problem, Oceanologica Acta, 24, 529–544, 2001.; Auclair, F., Estournel, C., Marsaleix, P., and Pairaud, I.: On coastal ocean embedded modelling, Geophys. Res. Lett., 33, L14602, doi:10.1029/2006GL026099, 2006.; Blumberg, A. F. and Mellor, G. L.: A description of a three-dimensional coastal circulation model, Three-Dimensional Coastal Ocean Models, Coastal Estuarine Sci., vol. 4, Ed. N. Heaps, AGU, Washington, D.C., 1–16, 1987.; Brozkova, R., Derkova, M., Bellus, M., and Farda, A.: Atmospheric forcing by ALADIN/MFSTEP and MFSTEP oriented tunings, Ocean Sci., 2, 113–121, 2006.; Johns, B., Marsaleix, P., Estournel, C., and Vehil, R.: On the wind-driven upwelling circulation in the Gulf of Lions, J. Mar. Syst., 3, 309–320, 1992.; Demirov, E. and Pinardi, N.: The Simulation of the Mediterranean Sea circulation from 1979 to 1993. Part I: The interannual variability, J. Mar. Syst., 33–34, 23–50, 2002.; Dufau-Julliand, C., Marsaleix, P., Petrenko, A., and Dekeyser, I.,: Three-dimensional modeling of the Gulf of Lion's hydrodynamics (northwest Mediterranean) during Jannuary 1999 (MOOGLI3 Experiment) and late winter 1999: Western Mediterranean Intermediate Water's (WIW's) formation and its cascading over the shelf break, J. Geophys. Res., 109, C11002, doi:10.1029/2003JC002019, 2004.; Emelianov, M., Font, J., Turiel, A., Solé, J., Poulain, P., Julià, A., and Vitrià, M. R. : Transformation of Levantine Intermediate Water tracked by MedArgo floats in Western Mediterranean, Ocean Sci., 2, 281–290, 2006.; Estournel, C., Kondrachoff, V., Marsaleix, P., and Vehil, R.: The plume of the Rhône : numerical simulation and remote sensing, Continental Shelf Res., 17, 899–924, 1997.; Estournel, C., Broche, P., Marsaleix, P., Devenon, J. L., Auclair, F., and Vehil, R.: The Rhone river plume in unsteady conditions : numerical and experimental results. Estuarine, Coastal and Shelf Sci., 53, 25–38, 2001.; Estournel, C., Durrieu de Madron, X., Marsaleix, P., Auclair, F., Julliand, C., and Vehil, R.: Observation and modelisation of the winter coastal oceanic circulation in the Gulf of Lions under wind conditions influenced by the continental orography (FETCH experiment), J. Geophys. Res., 108(C3), 7-1–7-18, 2003.; Gaspar, P., Grégoris, Y., and Lefevre, J. M.: A simple eddy kinetic energy model for simulations of the oceanic vertical mixing : tests at station Papa and long-term upper ocean study site, J. Geophys. Res., 95, 179–193, 1990.; Geernaert, G. L.: Bulk parameterizations for the wind stress and heat fluxes, in: Surface waves and fluxes, Vol I, edited by: Geernaert, G. L. and Plant, W. J., 91–192, 1999.; Haney, R. L.:. On the Pressure Gradient Force over Steep Topography in Sigma Coordinate Ocean Models, J. Phys. Oceanogr., 21, 610–619, 1991.; Guizien, K., Brochier, T., Duchêne, J.-C., Koh, B.-S., and Marsaleix, P.: Dispersal of owenia fusiformis larvae by wind-driven currents: turbulence, swimming behaviour and mortality in a three-dimensional stochastic model, Mar. Ecol. Prog. Ser., 311, 47–66, 2006.; Jorda Sanchez, G.: Towards data assimilation in the Catalan continental shelf – From data analysis to optimization method

 

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