Karine Olu¹, Clément Vic², Julien Legrand³, Swen Jullien⁴, Martin Patriat⁵, Hélène Leau³, Nan-Chin Chu⁶ and Takashi Toyofuku⁷, (1)Deep-Sea Ecosystem Laboratory. Univ. Brest, CNRS, Ifremer, UMR6197, Plouzané, France, (2)Laboratoire d’Océanographie Physique et Spatiale (LOPS), University of Brest, CNRS, Ifremer, IRD, IUEM, Plouzané, France, (3)IFREMER- Marine Engineering and Instrumentation Department, Plouzané, France, (4)Laboratory for Ocean Physics and Satellite remote sensing, Univ. Brest, CNRS, Ifremer, IRD, IUEM, Plouzané, France, (5)IFREMER - Geo-Ocean, Plouzané, France, (6)IFREMER- International relationships, Plouzané, France, (7)JAMSTEC Japan Agency for Marine-Earth Science and Technology, X-STAR, Kanagawa, Japan