David Bett^1,2, Paul Holland¹, Alberto Naveira Garabato², Adrian Jenkins¹, Pierre Dutrieux³ and Satoshi Kimura⁴, (1)NERC British Antarctic Survey, Cambridge, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (4)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan