Carsten Ankjær Ludwigsen¹, Robert Ricker², Nicolas Kolodziejczyk³, Laurent Bertino⁴, Stephen Howell⁵, Gustafson David⁶, Andreas Dobler⁷, Jan Wuite⁸, Emma Woolliams⁹, Ole Baltazar Andersen¹, Anna Maria Trofaier¹⁰ and ArcFresh, (1)DTU Space, Lyngby, Denmark, (2)Norwegian Research Centre, Tromsø, Norway, (3)UBO, CNRS, IRD, Ifremer, Laboratoire d’Oceanographie Physique et Spatiale (LOPS), Plouzane, France, Plouzane, France, (4)Nansen Environmental and Remote Sensing Center, Bergen, Norway, (5)Environment and Climate Change Canada, Climate Reseach Division, Toronto, ON, Canada, (6)Swedish Meteorological and Hydrological Institute, Norrköping, Sweden, (7)Norwegian Meteorological Institute, Oslo, Norway, (8)ENVEO, Innsbruck, Austria, (9)NPL, London, United Kingdom, (10)ESA, Harwell, United Kingdom