Alexander Haumann, Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, United States, Samuel Bartusek, Princeton University, Department of Geosciences, Princeton, NJ, United States, Tom Bracegirdle, British Antarctic Survey, Cambridge, United Kingdom, Michael Paul Meredith, NERC British Antarctic Survey, Cambridge, United Kingdom and Jorge L Sarmiento, Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States