1. School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK.
2. Cabot Institute, University of Bristol, Bristol BS8 1UJ, UK.
3. Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK.
4. Department of Geography and Environmental Science, Northumbria University, Newcastle upon Tyne, UK.
5. Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, USA.
6. Research Center for Earth System Science, Yunnan University, Chenggong District, Kunming, Yunnan 650091, PR China.
7. Knowing Earth Limited, Otley, West Yorkshire, UK.
8. CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China.
9. Getech Group plc, Leeds LS8 2LJ, UK.
10. Organic Geochemistry Unit, School of Earth Sciences, and School of Chemistry, University of Bristol, Bristol BS8 1RJ, UK.