Innes Hamilton, University of Leeds, Leeds, LS2, United Kingdom, Fausto Ferraccioli, NERC British Antarctic Survey, Cambridge, United Kingdom, Chris M Green, University of Leeds, Leeds, United Kingdom, Rene Forsberg, Technical University of Denmark - Space, Kongens Lyngby, Denmark, Graeme Eagles, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Geophysics, Bremerhaven, Germany, Bruce M Eglington, University of Saskatchewan, Saskatchewan Isotope Laboratory, Saskatoon, SK, Canada, Joachim Jacobs, University of Bergen, Department of Earth Science, Bergen, Norway and Ian W D Dalziel, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States