First Author:   Stephen Bazen Aix-Marseille Univ., CNRS, AMSE, Marseille, France stephen.bazen@univ-amu.fr   Ilot Bernard Dubois Boulevard Bourdet, 5 boulevard Maurice Bourdet Marseille cedex, 13205, France       Second Author: Jean-Marie Cardebat BSE, Université de Bordeaux jean-marie.cardebat@u-bordeaux.fr   Pessac, 33608, France