1. Department of Earth, Ocean and Atmospheric Sciences University of British Columbia Vancouver British Columbia Canada
2. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Bremerhaven Germany
3. Department of Earth Sciences The University of Hong Kong Hong Kong
4. College of Fisheries and Ocean Sciences University of Alaska Fairbanks Fairbanks AK USA
5. Department of Earth Sciences University of Minnesota Minneapolis MN USA
6. Mount Holyoke College South Hadley MA USA