Dr. Channing Prend, University of Edinburgh, Edinburgh, United Kingdom, James B Girton, Applied Physics Laboratory, University of Washington, Seattle, WA, United States, Graeme MacGilchrist, University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, Julia Neme, Australian National University, Canberra, Australia, Adele K Morrison, Australian National University and Australian Centre for Excellence in Antarctic Science, Canberra, ACT, Australia and Andrew F Thompson, CALTECH California Institute of Technology, Pasadena, United States