Gael Alory¹, Yvan Gouzenes¹, Gwenaël Martin¹, Philippe Téchiné¹, Roy Ngakala², Gilles Reverdin³, Denis Diverrès⁴, Stéphane Jacquin⁴, Céline Bachelier⁵ and Dimity Khvorostyanov⁶, (1)LEGOS, Toulouse, France, (2)Department of Oceanography and Applications, International Chair in Mathematical Physics and Applications, University of Abomey-Calavi, Cotonou, Benin, Cotonou, Benin, (3)Sorbonne Université-CNRS-IRD-MNHN, LOCEAN – IPSL, Paris, France, (4)IRD, Brest, France, (5)IRD, Nouméa, New Caledonia, (6)LOCEAN, Paris Cedex 05, France