Aditya Sharma, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Abigail J.R. Smith, Australian Antarctic Division, Kingston, Australia, Hannah Dawson, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, Australia, Sally E Thorpe, British Antarctic Survey, Cambridge, United Kingdom and Stuart Corney, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia