Nikita Qosholo, University of Cape Town, Oceanography, Cape Town, South Africa, Isabelle S Giddy, University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden; University of Gothenburg, Marine Sciences, Gothenburg, Sweden, Sarah-Anne Nicholson, Southern Ocean Carbon-Climate Observatory, CSIR, Cape Town, South Africa and Moagabo Ragoasha, University of Cape Town, Cape Town, South Africa