[1] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[4] Tech Univ Denmark, DTU SPACE, Geodynam Dept, Natl Space Inst, DK-2880 Lyngby, Denmark
[5] Univ Durham, Dept Geog, Durham DH1 3LE, England
[6] Univ Texas Austin, Ctr Space Res, Austin, TX 78759 USA
[7] Ohio State Univ, Byrd Polar Res Ctr, Polar Meteorol Grp, Columbus, OH 43210 USA
[8] Ohio State Univ, Dept Geog, Atmospher Sci Program, Columbus, OH 43210 USA
[9] UCL, Dept Earth Sci, Ctr Polar Observat & Modelling, London WC1E 6BT, England
[10] Tech Univ Munich, Inst Astron & Phys Geodasie, D-80333 Munich, Germany
[11] Lamont Doherty Earth Observ, Palisades, NY 10964 USA
[12] Univ Washington, Appl Phys Lab, Polar Sci Ctr, Seattle, WA 98105 USA
[13] Newcastle Univ, Sch Civil Engn & Geosci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[14] Univ Utrecht, Inst Marine & Atmospher Res, Utrecht, Netherlands
[15] Univ Kansas, Ctr Remote Sensing Ice Sheets, Lawrence, KS 66045 USA
[16] Swansea Univ, Coll Sci, Dept Geog, Swansea SA2 8PP, W Glam, Wales
[17] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Greenbelt, MD 20771 USA
[18] Univ Ottawa, Dept Earth Sci, Ottawa, ON K1N 6N5, Canada
[19] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA
[20] Univ Bristol, Sch Geog Sci, Bristol BS8 1SS, Avon, England
[21] British Antarctic Survey, Cambridge CB3 0ET, England
[22] Univ Innsbruck, Inst Meteorol & Geophys, A-6020 Innsbruck, Austria
[23] Univ Colorado, Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA
[24] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands
[25] NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, SGT Inc, Greenbelt, MD 20771 USA
[26] Univ Texas Austin, Inst Geophys, Austin, TX 78759 USA
[27] NASA, Goddard Space Flight Ctr, Cryospher Sci Lab, Greenbelt, MD 20771 USA
[28] Univ Tasmania, Sch Geog & Environm Studies, Hobart, Tas 7001, Australia