Paco Lopez Dekker, Delft University of Technology, Delft, Netherlands, Bruno Buongiorno Nardelli, CNR Institute of Marine Sciences, Naples, Italy, Bertrand Chapron, IFREMER, Univ. Brest, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale, Brest, France, Simona Masina, Euro-Mediterranean Center on Climate Change, Ocean Modeling and Data Assimilation Division, Bologna, Italy and Claudia Pasquero, University of Milano-Bicocca, Department of Earth and Environmental Sciences, Milan, Italy