1. SAEON Egagasini Node Cape Town South Africa
2. Department of OceanographyUniversity of Cape Town Cape Town South Africa
3. Nansen‐Tutu Centre for Marine Environmental ResearchUniversity of Cape Town Cape Town South Africa
4. Now at Coastal and Regional Oceanography Laboratory, School of Mathematics and StatisticsUniversity of New South Wales Sydney NSW Australia
5. GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel Germany
6. School of Environmental ScienceNelson Mandela University Port Elizabeth South Africa