Claudia Wekerle, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Physical Oceanography of the Polar Seas, Bremerhaven, Germany, Michael J Wolovick, Alfred Wegener Institute, Bremerhaven, Germany, Martin Rückamp, Organization Not Listed, ) Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany, Washington, DC, United States, Yuting Dong, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany, Ralph Timmermann, AWI, Bremerhaven, Germany and Torsten Kanzow, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Physical Oceanography of the Polar Seas, Bremerhaven, Germany