1. Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences University of Cambridge Cambridge UK
2. College of Earth, Ocean, and Atmospheric Sciences Oregon State University Corvallis OR USA
3. Department of Geoscience University of Wisconsin‐Madison Madison WI USA
4. Scripps Institution of Oceanography University of California, San Diego La Jolla CA USA
5. Department of Earth and Environmental Sciences University of Rochester Rochester NY USA