Gareth James Crutchley¹, Joshu J Mountjoy², Jess Hillman³, Bryan William Davy⁴, Sally Watson⁵, Susi Woelz⁶, Timothy Kane⁵, Peter Gerring⁵, Francesco Turco⁷ and Andrew R Gorman⁸, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)NIWA National Institute of Water and Atmospheric Research, Wellington, New Zealand, (3)GNS Science, Lower Hutt, New Zealand, (4)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (5)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (6)NIWA, Wellington, New Zealand, (7)University of Otago, Dunedin, New Zealand, (8)University of Otago, Department of Geology, Dunedin, New Zealand