Giulia Castellani, MARUM - University of Bremen, Bremen, Germany, Katja Wiegel, University of Bremen, Department of Environmental Physics, Bremen, Germany, Friederike Pollmann, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, Jan Streffing, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, Patrick Scholz, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Climate Sciences, Bremerhaven, Germany, Nils Brueggemann, Max-Planck Institute for Meteorology, Hamburg, Germany and Veronika Eyring, German Aerospace Center DLR Oberpfaffenhofen, Institute of Atmospheric Physics, Oberpfaffenhofen, Germany