Centre for Polar Observation and Modelling, UCL, Gower Street, London, WC1E 6BT, United Kingdom
Centre for Polar Observation and Modelling, UCL, Gower Street, London, WC1E 6BT, United Kingdom ; British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom
British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom
Mineral, Ice and Rock Physics Laboratory, Department of Earth Sciences, UCL, Gower Street, London, WC1E 6BT, United Kingdom