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**Team list.** Anny Cazenave (LEGOS, France, and ISSI, Switzerland), Benoit Meyssignac (LEGOS, France), Michael Ablain (CLS, France), Magdalena Balmaseda (ECMWF, UK), Jonathan Bamber (U. Bristol, UK), Valentina Barletta (DTU-SPACE, Denmark), Brian Beckley (SGT Inc./NASA GSFC, USA), Jérôme Benveniste (ESA/ESRIN, Italy), Etienne Berthier (LEGOS, France), Alejandro Blazquez (LEGOS, France), Tim Boyer (NOAA, USA), Denise Caceres (Goethe U., Germany), Don Chambers (U. South Florida, USA), Nicolas Champollion (U. Bremen, Germany), Ben Chao (IES-AS, Taiwan), Jianli Chen (U. Texas, USA), Lijing Cheng (IAP-CAS, China), John A. Church (U. New South Wales, Australia), Stephen Chuter (U. Bristol, UK), J. Graham Cogley (Trent U., Canada), Soenke Dangendorf (U. Siegen, Germany), Damien Desbruyères (IFREMER, France), Petra Döll (Goethe U., Germany), Catia Domingues (CSIRO, Australia), Ulrike Falk (U. Bremen, Germany), James Famiglietti (JPL/Caltech, USA), Luciana Fenoglio-Marc (U. Bonn, Germany), Rene Forsberg (DTU-SPACE, Denmark), Gaia Galassi (U. Urbino, Italy), Alex Gardner (JPL/Caltech, USA), Andreas Groh (TU-Dresden, Germany), Benjamin Hamlington (Old Dominion U., USA), Anna Hogg (U. Leeds, UK), Martin Horwath (TU-Dresden, Germany), Vincent Humphrey (ETHZ, Switzerland), Laurent Husson (U. Grenoble, France), Masayoshi Ishii (MRI-JMA, Japan), Adrian Jaeggi (U. Bern, Switzerland), Svetlana Jevrejeva (NOC, UK), Gregory Johnson (NOAA/PMEL, USA), Nicolas Kolodziejczyk (LOPS, France), Jür-
gen Kusche (U. Bonn, Germany), Kurt Lambeck (ANU, Australia, and ISSI, Switzerland), Felix Landerer (JPL/Caltech, USA), Paul Leclercq (UIO, Norway), Benoit Legresy (CSIRO, Australia), Eric Leuliette (NOAA, USA), William Llovel (LEGOS, France), Laurent Longuevergne (U. Rennes, France), Bryant D. Loomis (NASA GSFC, USA), Scott B. Luthcke (NASA GSFC, USA), Marta Marcos (UIB, Spain), Ben Marzeion (U. Bremen, Germany), Chris Merchant (U. Reading, UK), Mark Merrifield (UCSD, USA), Glenn Milne (U. Ottawa, Canada), Gary Mitchum (U. South Florida, USA), Yara Mohajerani (UCI, USA), Maeva Monier (Mercator-Ocean, France), Didier Monselesan (CSIRO, Australia), Steve Nerem (U. Colorado, USA), Hindumathi Palanisamy (LEGOS, France), Frank Paul (UZH, Switzerland), Begoña Perez (Puentes del Estados, Spain), Christopher G. Piecuch (WHOI, USA), Rui M. Ponte (AER inc., USA), Sarah G. Purkey (SIO/UCSD, USA), John T. Reager (JPL/Caltech, USA), Roelof Rietbroek (U. Bonn, Germany), Eric Rignot (UCI and JPL, USA), Riccardo Riva (TU Delft, The Netherlands), Dean H. Roemmich (SIO/UCSD USA), Louise Sandberg Sørensen (DTU-SPACE, Denmark), Ingo Sasgen (AWI, Germany), E.J.O. Schrama (TU Delft, The Netherlands), Sonia I. Seneviratne (ETHZ, Switzerland), C.K. Shum (Ohio State U., USA), Giorgio Spada (U. Urbino, Italy), Detlef Stammer (U. Hamburg, Germany), Roderic van de Wal (U. Utrecht, The Netherlands), Isabella Velicogna (UCI and JPL, USA), Karina von Schuckmann (Mercator-Océan, France), Yoshihide Wada (U. Utrecht, The Netherlands), Yiguo Wang (NERSC/BCCR, Norway), Christopher Watson (U. Tasmania, Australia), David Wiese (JPL/Caltech, USA), Susan Wijffels (CSIRO, Australia), Richard Westaway (U. Bristol, UK), Guy Woppelmann (U. La Rochelle, France), Bert Wouters (U. Utrecht, The Netherlands).