Andreas Klocker, University of Tasmania, Institute for Marine and Antarctic Studies, Tasmania, TAS, Australia, Alberto Naveira Garabato, University of Southampton, National Oceanography Centre, Southampton, United Kingdom, Alexander Forryan, University of Southampton, Southampton, United Kingdom, Casimir de Lavergne, LOCEAN Laboratory, Sorbonne Université-CNRS-IRD-MNHN, Paris, France and Stephen R Rintoul, Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC), Hobart, Australia