1. Department of Earth and Environmental Sciences University of Minnesota Minneapolis MinnesotaUSA
2. Woods Hole Oceanographic Institution Woods Hole MassachusettsUSA
3. Canadian Wildlife Service Environment and Climate Change Canada Ottawa Ontario Canada
4. British Antarctic Survey Cambridge UK
5. Department of Physics Friedrich‐Alexander University of Erlangen‐Nürnberg Erlangen Germany
6. School of Earth and Environment University of Canterbury Christchurch New Zealand