Monitoring of the Northern Current in the Gulf of Lions with an observing system simulation experiment

Abstract : The coastal circulation in the Gulf of Lions (GoL) is influenced by the Northern Current (NC), forced by a complex wind system and also affected by important river discharges from the Rhône River. Correct modelling of this current is therefore important for obtaining a good representation of the gulf circulation. An observing system simulation experiment using the SEEK filter data assimilation method was used in a regional 1/16° configuration of the GoL in the NEMO model. The synthetic observation database used for the experiment comprised altimetric data in addition to in- situ temperature and salinity profiles. Statistical diagnostics and other physical criteria based on the improvement of NC representation were set up in order to assess the quality of this experiment. Comparisons between the free 1/16° simulation and the experience with assimilation show that data assimilation significantly improved the description of the characteristics of the NC as well as its seasonal and mesoscale variability, which in turn improved the description of the water exchanges between the coastal region and the open sea.
Type de document :
Article dans une revue
Scientia Marina, Consejo Superior de Investigaciones Científicas, 2012, 76 (3), pp.441-453. 〈10.3989〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-00745407
Contributeur : Mio Aigle <>
Soumis le : jeudi 25 octobre 2012 - 14:39:43
Dernière modification le : mardi 2 octobre 2018 - 12:42:02

Identifiants

  • HAL Id : hal-00745407, version 1
  • DOI : 10.3989

Citation

Aurélie Duchez, Jacques Verron, Jean-Michel Brankart, Yann Ourmières, Philippe Fraunié. Monitoring of the Northern Current in the Gulf of Lions with an observing system simulation experiment. Scientia Marina, Consejo Superior de Investigaciones Científicas, 2012, 76 (3), pp.441-453. 〈10.3989〉. 〈hal-00745407〉

Partager

Métriques

Consultations de la notice

484