World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Scale Oriented Embedded Modeling of the North-western Mediterranean in the Frame of Mfstep : Volume 5, Issue 2 (27/04/2009)

By Estournel, C.

Click here to view

Book Id: WPLBN0004020421
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: Scale Oriented Embedded Modeling of the North-western Mediterranean in the Frame of Mfstep : Volume 5, Issue 2 (27/04/2009)  
Author: Estournel, C.
Volume: Vol. 5, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Auclair, F., Lux, M., Marsaleix, P., Estournel, C., & Nguyen, C. (2009). Scale Oriented Embedded Modeling of the North-western Mediterranean in the Frame of Mfstep : Volume 5, Issue 2 (27/04/2009). Retrieved from http://worldpubliclibrary.org/


Description
Description: Pôle d'Océanographie Côtière de Toulouse – Laboratoire d'Aérologie, CNRS, Université de Toulouse, Toulouse, France. An embedded forecasting system was developed for the North-Western Mediterranean at 3-km resolution. The system is based on the Symphonie hydrodynamic free surface model and on the variational initialization and forcing platform VIFOP. The regional model is initialized and forced at its open lateral boundaries by the MFS GCM and forced at the surface by the ALADIN numerical weather prediction model. Once a week, a five-day forecast is produced after a hindcast of seven days. This pre-modeling period of 7 days before beginning the forecast allows the development of the small scale features associated to the high resolution. The relevance of the 5-day forecast strategy has been examined by comparing the forecasted fields to hindcast fields (forced by meteorological and oceanic analyses) considered as a reference. Mismatches remain at a very low level indicating a good quality of the forecasted forcing fields and also possibly to the strong wind conditions which prevailed during the period. The embedded forecasts have been compared to the MFS observing system (SST and MedArgo) during 6 forecast cycles between September 2004 and February 2005. 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 30m deep can be attributed to an overestimation of the turbulent mixing. The regional model allows 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., Marsaleix, P., and Estournel, C.: Sigma coordinate pressure gradient errors : evaluation and reduction by an inverse method, J. Atmos. Ocean. Tech., 17, 1348–1367, 2000a.; Auclair, F., Casitas, S., and Marsaleix, P.: Application of an inverse method to coastal modelling, J. Atmos. Ocean. Tech., 17, 1368–1391, 2000b.; 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, Oceanol. 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, in: Three-Dimensional Coastal Ocean Models, edited by: Heaps, N., Coastal Estuarine Sci., Vol 4, AGU, Washington, DC, 1–16, 1987.; Bro$\check\rm z$ková, R., Derková, M., Bellu$\check\rm s$, M., and Farda, A.: Atmospheric forcing by ALADIN/MFSTEP and MFSTEP oriented tunings, Ocean Sci., 2, 113–121, 2006.; Haney, R. L.:. On the Pressure Gradient Force over Steep Topography in Sigma Coordinate Ocean Models. J. Phys. Oceanogr., 21, 610–619, 1991.; Demirov, E. and Pinardi, N.: The Simulation of the Mediterranean Sea circulation from 1979 to 1993: Part I. The interannual variability, J. Marine 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., Millot, C., Solé, J., Poulain, P.-M., Julià, A., and Vitrià, M.-R.: Transformation of Levantine Intermediate Water tracked by MEDARGO floats in the 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, Cont. 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, Estuar. Coast. 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.; Gatti, J.: Intrusions du Courant Nord Méditerranéen sur la partie est du plateau continental du Golfe du Lion, Ph.D. thesis, Université de la Mediterranée, 2008.; Georgelin, M. and Richard, E.: Numerical simulation of flow diversion around the Pyrenees: A tramontana case study, Mon. Weather Rev., 124, 687–700, 1996.; Geernaert, G. L.: Bulk parameterizations for the wind stress and heat fluxes, in: Surface waves and fluxes, edited by: Geernaert, G. L. and Plant, W. J., I, 91–192, 1990.; 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.; Johns, B., Marsaleix, P., Estournel, C., and Vehil, R.: On the wind-driven upwelling circulation in the Gulf of Lions, J. Marine Syst., 3, 309–320, 1992.; Jorda Sanchez, G.: Towards data assimilation in the Catalan continental shelf – From data analysis to optimization methods, Ph.D. t

 

Click To View

Additional Books


  • A New Method for Forming Approximately N... (by )
  • Estuarine Circulation Reversals and Rela... (by )
  • On the Multiple Time Scales of Variabili... (by )
  • Ensemble Perturbation Smoother for Optim... (by )
  • Predictions for Oil Slicks Detected from... (by )
  • Combining In-situ Measurements and Altim... (by )
  • Wave Induced Mixing and Transport of Buo... (by )
  • Obstacles and Benefits of the Implementa... (by )
  • Observed Decline of the Atlantic Meridio... (by )
  • Circulation, Eddies, Oxygen, and Nutrien... (by )
  • Retroflection from Slanted Coastlines-ci... (by )
  • X-band Cosmo-skymed Wind Field Retrieval... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.