1. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany
2. Faculty of Geosciences University of Bremen Bremen Germany
3. Now at Technical University of Munich Munich Germany
4. Geomar Helmholtz Centre for Ocean Research Kiel Kiel Germany
5. Now at K.U.M. Umwelt‐ und Meerestechnik Kiel GmbH Kiel Germany