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Ocean Science An interactive open-access journal of the European Geosciences Union

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© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
09 Feb 2012
Review status
This discussion paper has been under review for the journal Ocean Science (OS). The revised manuscript was not accepted.
NEMO on the shelf: assessment of the Iberia–Biscay–Ireland configuration
C. Maraldi1, J. Chanut2, B. Levier2, G. Reffray2, N. Ayoub1, P. De Mey1, F. Lyard1, S. Cailleau2, M. Drévillon2, E. A. Fanjul3, M. G. Sotillo3, P. Marsaleix4, and the Mercator Team2 1LEGOS/CNRS/Université de Toulouse, UMR5566, 14 avenue Edouard Belin, 31400, Toulouse, France
2Mercator-Océan, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville Saint Agne, France
3Puertos del Estado, Avda. del Partenón, 10 – 28042 Madrid, Spain
4Laboratoire d'Aérologie/CNRS/Université de Toulouse, 14 avenue Edouard Belin, 31400, Toulouse, France
Abstract. A high resolution simulation covering the Iberia–Biscay–Ireland (IBI) region is set-up over July 2007–February 2009. The NEMO model is used with a 1/36° horizontal resolution on 50 z-levels in the vertical. It is forced by the astronomical potential and atmospheric forcing fields which consist of 3-hourly ECMWF analyses. Initial hydrographic conditions are derived from an Atlantic and Mediterranean Sea analyse at 1/12° from Mercator Ocean (PSY2V3 model). At the open boundaries, IBI is forced with PSY2V3 temperature and salinity fields. It is also forced with tidal currents and elevations and inverse barometer elevations. In this study we evaluate the realism of the simulation through comparisons with an extensive observational dataset including climatology, temperature and salinity profiles, satellite SST data, sea surface buoys, tide gauges, altimeter data and HF radar data. A specific interest is given to the procedure used for the validation. General aspects of the simulation and its quality are analysed and particular attention is given to the validation of high frequency processes including the diurnal cycle, barotropic and internal tides, and surges. Finally, we focus on specific aspects of the circulation on the European sea shelves and give a qualitative assessment by studying tidal fronts, and specially the Ushant front, and the winter extension of the Iberian Poleward Current along the Northern Spanish coast during winter 2007–2008.

Citation: Maraldi, C., Chanut, J., Levier, B., Reffray, G., Ayoub, N., De Mey, P., Lyard, F., Cailleau, S., Drévillon, M., Fanjul, E. A., Sotillo, M. G., Marsaleix, P., and the Mercator Team: NEMO on the shelf: assessment of the Iberia–Biscay–Ireland configuration, Ocean Sci. Discuss., 9, 499-583,, 2012.
C. Maraldi et al.
C. Maraldi et al.
C. Maraldi et al.


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