1. Department of Geophysics, School of Earth, Energy and Environmental Sciences Stanford University Stanford CA USA
2. Department of Electrical Engineering, School of Engineering Stanford University Stanford CA USA
3. Scott Polar Research Institute University of Cambridge Cambridge UK
4. British Antarctic Survey Cambridge UK
5. Department of Geography and Sustainable Development University of St Andrews St Andrews UK
6. Centre for Glaciology, Department of Geography and Earth Sciences Aberystwyth University Aberystwyth Ceredigion UK
7. Glaciology and Climate Geological Survey of Denmark and Greenland Copenhagen Denmark
8. Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geology University of Tromsø Tromsø Norway
9. Department of Electronic and Electrical Engineering University College London London UK