1. Centre for Polar Observation and Modelling, Department of Meteorology, University of Reading, Reading, United Kingdom
2. Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, Maryland
3. Goddard Earth Science Technology and Research Program, Mergan State University, Baltimore, Maryland
4. Centre for Polar Observation and Modelling, University College London, London, United Kingdom
5. National Oceanography Center, University of Southampton, Southampton, United Kingdom