1. Department of OceanographyUniversity of Cape Town Cape Town South Africa
2. South African Environmental Observations NetworkSAEON Egagasini Node Cape Town South Africa
3. Rosenstiel School of Marine and Atmospheric ScienceUniversity of Miami Miami FL USA
4. Laboratoire d'Oceanographie Physique et Spatiale, University of Brest, CNRS, IRD, Ifremer, IUEM Brest France