Martin Horwath¹, Anny A Cazenave², Hindumathi Kulaiappan Palanisamy³, Florence Marti³, Ben Marzeion^4,5, Frank Paul⁶, Raymond Le Bris⁶, Anna Hogg⁷, Inès Otosaka⁸, Andrew Shepherd⁸, Petra M Doll⁹, Denise Caceres¹⁰, Hannes Mueller Schmied¹¹, Johnny A. Johannessen¹², Jan Even Øie Nilsen¹², Roshin P. Raj¹², Rene Forsberg¹³, Louise Sandberg Sorensen¹⁴, Valentina R. Barletta¹³, Per Knudsen¹⁵, Ole Baltazar Andersen¹⁶, Heidi Villadsen¹⁷, Stine Kildegaard Rose¹⁸, Christopher J Merchant¹⁹, Claire MacIntosh²⁰, Karina von Schuckmann²¹, Benjamin D. Gutknecht²², Kristin Novotny²², Andreas Groh¹, Matthias Oskar Willen¹, Marco Restano²³, Jérôme Benveniste²⁴ and Hindumathi Kulaiappan Palanisamy, (1)TU Dresden, Dresden, Germany, (2)Laboratoire d'Etudes en Geophysique et Oceanographie Spatiale, Observatoire Midi Pyrénées, LEGOS-CNES-CNRS-IRD-UPS, Toulouse, France, (3)LEGOS, Toulouse, France, (4)University of Innsbruck, Innsbruck, Austria, (5)University of Bremen, Bremen, Germany, (6)University of Zurich, Zurich, Switzerland, (7)University of Leeds, Leeds, United Kingdom, (8)University of Leeds, Leeds, LS2, United Kingdom, (9)Univ Franfurt/Main, Frankfurt am Main, Germany, (10)Goethe University Frankfurt, Institute of Physical Geography, Frankfurt, Germany, (11)Goethe University Frankfurt, Senckenberg Biodiversity and Climate Research Centre, Institute of Physical Geography, Frankfurt am Main, Germany, (12)Nansen Environmental and Remote Sensing Center, Bergen, Norway, (13)Technical University of Denmark - Space, Kongens Lyngby, Denmark, (14)National Space Institute, Copenhagen Oe, Denmark, (15)Technical University of Denmark, Kgs. Lyngby, Denmark, (16)DTU Space, Lyngby, Denmark, (17)DTU Space, National Space Institute, Technical University of Denmark, Lyngby, Denmark, (18)DTU Space, Kgs. Lyngby, Denmark, (19)University of Reading, Department of Meteorology, Reading, United Kingdom, (20)University of Reading, Reading, United Kingdom, (21)Mercator Ocean, Toulouse, France, (22)Dresden University of Technology, Dresden, Germany, (23)SERCO/ESRIN, Frascati, Italy, (24)European Space Agency (ESA-ESRIN), Earth Observation Programmes, Frascati, Italy