1. Department of Earth and Environmental Sciences, Open University , Milton Keynes MK7 6AAUK
2. School of Geosciences, University of Edinburgh
West Mains RoadEdinburgh EH9 3JNUK
3. Department of Earth Science and Engineering, South Kensington Campus, Imperial College London , London SW7 2AZUK
4. Planetary and Space Sciences Research Institute Open UniversityMilton Keynes MK7 6AAUK
5. School of Biosciences, Division of Agriculture and Environmental Sciences, University of Nottingham , Nottingham NG7 2RDUK
6. Thermo Fisher Scientific, Stafford House
Boundary WayHemel Hempstead HP2 7GEUK
7. Department of Animal and Plant Sciences, University of Sheffield , Sheffield S10 2TNUK
8. Abisko Scientific Research Station , SE-981 07 AbiskoSweden