1. Chemical Oceanography DepartmentHelmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20 Kiel Germany
2. Physical Oceanography DepartmentHelmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20 Kiel Germany
3. Faculty of Mathematics and Natural SciencesKiel University Kiel Germany
4. Department of Environmental AffairsOceans and Coasts Research Branch Cape Town South Africa
5. Marine Research Institute and Department of OceanographyUniversity of Cape Town Rondebosch South Africa
6. Leibniz Institute for Baltic Sea Research Warnemünde, Seestraße 15 Rostock Germany