1. Laboratoire d'Etudes en Géophysique et Océanographie Spatiale (LEGOS), CNRS/IRD/UPS/CNES Toulouse France
2. Department of Oceanography, MARE Institute, LMI ICEMASA University of Cape Town Cape Town South Africa
3. Nansen‐Tutu Centre, Marine Research Institute, Department of Oceanography University of Cape Town Cape Town South Africa
4. Research Division Ocean Circulation and Climate Dynamics GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel Germany
5. Faculty of Mathematics and Natural Sciences Christian‐Albrechts‐Universität zu Kiel Kiel Germany