Duo Chan¹, Steven Chan², Joseph T Siddons², Richard Cornes³, Archie Cable², Elizabeth C Kent², Geoffrey Gebbie⁴ and Peter J Huybers⁵, (1)University of Southampton, School of Ocean and Earth Science, Southampton, United Kingdom, (2)National Oceanography Centre, Southampton, United Kingdom, (3)National Oceanography Centre, Southampton, UNITED KINGDOM, (4)Woods Hole Oceanographic Institution, Woods Hole, United States, (5)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States