1. AWI, Anglesea, Victoria, Australia;
2. Alfred Wegener Institute, Bremerhaven, and University of Bremen, Bremen, Germany;
3. CNRM, Météo France, CNRS UMR 3589, Toulouse, France;
4. Byrd Polar and Climate Research Center, The Ohio State University, Columbus, Ohio;
5. Meteorological Research Division, Environment and Climate Change Canada, Dorval, Quebec, Canada;
6. European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom;
7. World Meteorological Organization, Geneva, Switzerland;
8. Korea Polar Research Institute, Incheon, South Korea;
9. National Center for Weather and Climate Prediction, College Park, Maryland;
10. National Institute of Polar Research, Tokyo, Japan;
11. University of Colorado Boulder, Boulder, Colorado;
12. Norwegian Meteorological Institute, Oslo, Norway;
13. Wageningen University, Wageningen, Netherlands;
14. University of Canterbury, Christchurch, New Zealand;
15. Danish Meteorological Institute, Copenhagen, Denmark;
16. Cold Regions Research and Engineering Laboratory, Hanover, New Hampshire;
17. School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom;
18. Arctic and Antarctic Research Institute, Saint Petersburg, Russia;
19. Department of Meteorology, Stockholm University, Stockholm, Sweden;
20. National Marine Environmental Forecasting Center, Beijing, China;
21. NOAA/Physical Science Division, Boulder, Colorado;
22. Zhuhai Campus, Sun Yat-sen University, Zhuhai, Guangdong, China