Laura Wilkie johnston¹, Amanda Burson², Jutta Niggemann³, Thorsten Dittmar⁴, Matthew William Jones⁵ and Clara Manno², (1)British Antarctic Survey, Cambridge, United Kingdom, (2)NERC British Antarctic Survey, Cambridge, United Kingdom, (3)Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany, (4)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, (5)University of East Anglia, Norwich, United Kingdom