1. School of Geography, Earth and Environmental Sciences; University of Birmingham; Edgbaston; UK
2. National Oceanography Centre Southampton; University of Southampton; Southampton; UK
3. Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences; Cambridge University; Cambridge; UK
4. Bristol Isotope Group, Department of Earth Sciences; University of Bristol; Bristol; UK
5. Department of Earth Sciences; Royal Holloway University of London; Egham; UK
6. Climate Sciences; Alfred Wegener Institute for Polar and Marine Research; Bremerhaven; Germany
7. Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre, School of Chemistry; University of Bristol; Bristol; UK