1. Max Planck Institute for Meteorology; Hamburg Germany
2. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research; Bremerhaven Germany
3. Department of Astrophysics, Geophysics and Oceanography; University of Liège; Liège Belgium
4. Geophysical Institute; University of Bergen; Bergen Norway
5. Bjerknes Centre for Climate Research; Bergen Norway
6. Uni Climate; Uni Research AS; Bergen Norway