1. Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA.
2. Earth and Atmospheric Sciences Department and the Purdue Climate Change Research Center (PCCRC), Purdue University, West Lafayette, IN 47906, USA.
3. Department of Earth Sciences, The University of Hong Kong, Hong Kong, People’s Republic of China.
4. School of Ocean and Earth Science, University of Southampton, Southampton SO14 3ZH, UK.
5. Department of Earth Sciences, Uppsala University, SE-75 236 Uppsala, Sweden.
6. Climate Change Research Centre, Faculty of Science, University of New South Wales, Sydney 2052, Australia.
7. Department of Geosciences, University of Massachusetts-Amherst, Amherst, MA 01003, USA.