1. Nansen Environmental and Remote Sensing Center, Bergen, Norway;
2. Geophysical Institute, University of Bergen, Norway;
3. Max Planck Institute for Meteorology, Hamburg, Germany;
4. Environmental Systems Science Centre, University of Reading, UK;
5. Bjerknes Centre for Climate Research, Bergen, Norway;
6. Environmental Systems Analysis Research Center, Boulder, Colorado, USA;
7. Nansen International Environmental and Remote Sensing Center, St Petersburg, Russia;
8. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russia;
9. Arctic and Antarctic Research Institute, St Petersburg, Russia;
10. Hadley Centre for Climate Prediction and Research, Bracknell, UK