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| Titel |
Assimilation of HF radar surface currents to optimize forcing in the northwestern Mediterranean Sea |
| VerfasserIn |
J. Marmain, A. Molcard, P. Forget, A. Barth, Y. Ourmières |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 21, no. 3 ; Nr. 21, no. 3 (2014-06-11), S.659-675 |
| Datensatznummer |
250120921
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| Publikation (Nr.) |
 copernicus.org/npg-21-659-2014.pdf |
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| Zusammenfassung |
| 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. |
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