1. a Laboratory of Oceanology and Geosciences, UMR8187, Univ. Littoral Côte d’Opale, CNRS, Univ. Lille, IRD, Wimereux, France
2. b Naval Research Laboratory, Stennis Space Center, Mississippi
3. c Mediterranean Institute of Oceanography, Aix-Marseille University, University of Toulon, CNRS, IRD, Marseille, France
4. d LOPS, IFREMER, CNRS, UBO, IRD, Plouzané, France