1. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Potsdam Germany
2. Institute of Physics and Astronomy University of Potsdam Potsdam Germany
3. Norwegian Ice Service, Norwegian Meteorological Institute Tromsø Norway
4. Norwegian Polar Institute Fram Centre Tromsø Norway
5. Institute of Geophysics Polish Academy of Sciences Warsaw Poland
6. Arctic and Antarctic Research Institute, Polar Climate Department St. Petersburg Russia
7. Saint‐Petersburg State University, Oceanographic Department St. Petersburg Russia