1. Carbon Cycle Research Group, Space and Atmospheric Physics Department of Physics Imperial College London London UK
2. Department of Life Sciences Imperial College London Ascot UK
3. Stable Light Isotope Laboratory University of Cape Town Cape Town South Africa
4. Grantham Institute – Climate Change and the Environment Imperial College London London UK
5. Department of Biological Sciences Macquarie University North Ryde NSW Australia
6. Department of Earth System Science Tsinghua University Beijing China