1. Department of Geography; RWTH Aachen University; Aachen Germany
2. Institute of Atmospheric and Cryospheric Sciences; University of Innsbruck; Innsbruck Austria
3. Institute for Marine and Atmospheric Research Utrecht; University of Utrecht; Utrecht Netherlands
4. Department of Earth Sciences; Uppsala University; Uppsala Sweden
5. Institute of Geophysics; Polish Academy of Sciences; Warsaw Poland
6. Fram Centre; Norwegian Polar Institute; Tromsø Norway