1. Institute of Environmental Physics University of Bremen Bremen Germany
2. Helmholtz Centre for Polar and Marine Research Alfred Wegener Institute Bremerhaven Bremerhaven Germany
3. Faculty of Physics and Earth Science Leipzig University Leipzig Germany
4. Department of Geography Kiel University Kiel Germany
5. Institute of Oceanography University of Hamburg Hamburg Germany
6. Polar Science Center Applied Physics Laboratory University of Washington Seattle WA USA
7. Thayer School of Engineering Dartmouth College Hanover NH USA