Reference : Assimilation of HF radar surface currents to optimize forcing in the northwestern Med...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Assimilation of HF radar surface currents to optimize forcing in the northwestern Mediterranean Sea
Marmain, J. [> >]
Molcard, A. [> >]
Forget, P. [> >]
Barth, Alexander mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER) >]
Ourmières, Y. [> >]
Nonlinear Processes in Geophysics
European Geosciences Union
Yes (verified by ORBi)
[en] HF radar surface currents ; Mediterranean Sea ; Data assimilation
[en] HF radar measurements are used to optimize surface wind forcing and baroclinic open boundary condition forcing in order to constrain model coastal surface currents. This method is applied to a northwestern Mediterranean (NWM) regional primitive equation model configuration. A new radar data set, provided by two radars deployed in the Toulon area (France), is used. To our knowledge, this is the first time that radar measurements of the NWM Sea are assimilated into a circulation model. Special attention has been paid to the improvement of the model coastal current in terms of speed and position. The data assimilation method uses an ensemble Kalman smoother to optimize forcing in order to improve the model trajectory. Twin experiments are initially performed to evaluate the method skills. Real measurements are then fed into the circulation model and significant improvements to the modeled surface currents, when compared to observations, are obtained.
GeoHydrodynamics and Environment Research
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Students

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