1. Center for Climatic Research University of Wisconsin‐Madison Madison Wisconsin USA
2. Department of Geography Rutgers, The State University of New Jersey New Brunswick New Jersey USA
3. NASA Goddard Institute for Space Studies New York New York USA
4. Lamont Doherty Earth Observatory of Columbia University Palisades New York USA
5. National Snow and Ice Data Center Boulder Colorado USA
6. Centre for Polar Observation and Modelling Pearson Building University College London London UK
7. Department of Geography University of Georgia Athens Georgia USA