1. Lamont-Doherty Earth Observatory; Columbia University; Palisades New York USA
2. Department of Earth and Environmental Sciences; Columbia University; New York New York USA
3. Research School of Earth Sciences; Australian National University; Canberra ACT Australia
4. Institute for Marine Sciences; Rutgers University; New Brunswick New Jersey USA
5. Department of Earth and Planetary Sciences; Rutgers University; New Brunswick New Jersey USA
6. Department of Earth and Planetary Sciences; University of California; Davis California USA
7. Division of Geological and Planetary Sciences; California Institute of Technology; Pasadena California USA
8. Bristol Isotope Group; University of Bristol; Bristol UK
9. Department of Earth and Environmental Sciences; University of St. Andrews; St. Andrews UK