1. Department of Environmental Sciences, Informatics and Statistics Università Ca' Foscari Venice Italy
2. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research Bremerhaven Germany
3. Department of Geosciences University of Bremen Bremen Germany
4. TOFWERK AG Thun Switzerland
5. Department of Geosciences Eberhard Karls University of Tübingen Tübingen Germany
6. Institute of Polar Sciences CNR Venice Italy