Bogussing in La Réunion island

(more details isabelle.soulan++at++meteo.fr )

The Cyclone Research Cell of Météo-France in La Réunion island is working on a kind of bogussing on an idea of Jean-Francois Geleyn in order to improve the tropical cyclone track prediction with ARPEGE/ALADIN.

Usually, the ARPEGE/ALADIN models can see a tropical cyclone when there is one, but it is not often at the right place. That is why we intend to modify the fields of ALADIN in order to improve the description of the cyclone, then correct ARPEGE using the new ALADIN files.

We hope that when ARPEGE starts a prediction with a good location of the center of the tropical cyclone, it can give a good track prediction. The first point is under study in La Réunion, the second one under development in Toulouse.

References :

• Agricole Wills et BenAmadi Yahaya : Evaluation d'une nouvelle méthode d'assimilation de cyclones tropicaux faisant appel au couple Arpege étiré-Aladin. Rapport de stage de recherche Mastère de l'ENM, année : 1996/1997
• Goolaup Premchand et Félix Randrianavalona : Assimilation de cyclones tropicaux à l'aide des modèles Arpege étiré-Aladin. Rapport de stage de recherche Mastère de l'ENM, année : 1995/1996

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