Marcel du Plessis, University of Cape Town, Department of Oceanography, Cape Town, South Africa, Sebastiaan Swart, University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden, Andrew F Thompson, California Institute of Technology, Physical Oceanography, Pasadena, CA, United States, Pedro M. S. Monteiro, CSIR, Cape Town, South Africa, Louise C Biddle, University of Gothenburg, Department of Marine Science, Gothenburg, Sweden and Sarah-Anne Nicholson, Council for Scientific and Industrial Research, Cape Town, South Africa