Alex Roberts¹, Casimir de Lavergne², Helen L Johnson³, Andreas Klocker⁴ and Alberto Naveira Garabato¹, (1)University of Southampton, School of Ocean and Earth Science, Southampton, United Kingdom, (2)LOCEAN Laboratory, Sorbonne Université-CNRS-IRD-MNHN, Paris, France, (3)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (4)NORCE Norwegian Research Center, Bjerknes Centre for Climate Research, Bergen, Norway