Gael Forget¹, Susanna Winkelbauer², Michael Mayer³, Yuanyuan Song¹, Romain Bourdalle-Badie⁴ and Chunxue Yang⁵, (1)Massachusetts Institute of Technology, EAPS, Cambridge, United States, (2)University of Vienna, Department of Meteorology and Geophysics, Vienna, Austria, (3)University of Vienna, Meteorology and Geophysics, Vienna, Austria, (4)Mercator Ocean international, Ramonville Saint-Agne, France, (5)CNR Institute for Marine Science, Rome, Italy