1. School of GeoSciencesUniversity of Edinburgh Edinburgh UK
2. College of Life and Environmental SciencesUniversity of Exeter Exeter UK
3. School of GeosciencesUniversity of Aberdeen Aberdeen UK
4. Earth and Planetary Science DepartmentUniversity of California Berkeley California USA
5. Lamont‐Doherty Earth ObservatoryColumbia University Palisades New York USA
6. British Antarctic Survey Cambridge UK