1. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research Potsdam Germany
2. Florence Bascom Geoscience Center U.S. Geological Survey Reston VA USA
3. Geosciences and Environmental Change Science Center U.S. Geological Survey Corvallis OR USA
4. Department of Physical Geography and Bolin Centre for Climate Research Stockholm University Stockholm Sweden
5. Earth and Oceanographic Science Department and Environmental Studies Program Bowdoin College Brunswick ME USA
6. Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham NH USA