1. Laboratoire de Physique des Océans, UMR 6523 (CNRS, Ifremer, IRD, UBO); Plouzané France
2. Department of Oceanography; University of Cape Town; Cape Town South Africa
3. LMI ICEMASA, IRD; University of Cape Town; Cape Town South Africa
4. Nansen-Tutu Centre for Marine Environmental Research; University of Cape Town; Cape Town South Africa
5. Laboratoire d'Océanographie et du Climat: Expérimentations et Approches Numériques; UMR 7159 (CNRS, IRD, MHN, UPMC); Paris France