1. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research Potsdam Germany
2. Institute of Geophysics and Meteorology University of Cologne Cologne Germany
3. Department of Geosciences University of Oslo Oslo Norway
4. Bayreuth Center of Ecology and Environmental Research (BayCEER) University of Bayreuth Bayreuth Germany
5. Geography Department Humboldt University Berlin Germany