Isabel Sauermilch, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, Australia, Joanne M Whittaker, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Andreas Klocker, University of Tasmania, Institute for Marine and Antarctic Studies, Tasmania, Australia, David Roy Munday, British Antarctic Survey, Cambridge, United Kingdom, Katharina Hochmuth, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany; University of Leicester, Leicester, United Kingdom, Joseph Henry LaCasce, University of Oslo, Department of Geosciences, Oslo, Norway and Peter Bijl, Utrecht University, Utrecht, Netherlands