Acknowledgements
We thank the captains, crews, and scientific members of the RVInvestigator cruises IN2018_V02 and IN2018_V04 as well as the trace metal sampling teams, especially Robin Grun, Pamela Barrett, and Kiefer Forsch, the sediment coring team of Kelly-Anne Lawler, Hannah Kumar, Annabel Payne, and Hannah Wilson, and Phil Boyd for coordinating and planning trace metal operations on cruise IN2018_V02. The authors wish to thank the CSIRO Marine National Facility (MNF) for its support in the form of sea time on RV Investigator, support personnel, scientific equipment and data management. We thank the captains, crew, and scientific personnel of the additional cruises from which we present new data (ACE Leg 1, GP13, M77/4, Line P 2012-13, DY110) as well as Christel Hassler and Andy Bowie for samples from cruise GP13, Nina Schuback for sampling on cruise DY110, and Martin Frank and Patricia Grasse for samples from cruise M77/4. We thank Julijana Krbanjevic for TC/TIC analysis. We acknowledge Zanna Chase, Barbara Grose, and Pete Strutton for logistical support, Zanna Chase for the use of her centrifuge on voyage IN2018V_04, and Martin Wille for sharing analytical expertise, Neptune support, and for helpful discussions. We thank Tim Conway for providing CTD data for the SAFe station. This manuscript was improved by constructive comments from Lou Derry and two anonymous reviewers. This work was supported by the Swiss National Science Foundation (SNSF grant PP00P2_172915) and by a European Research Council (ERC) Consolidator Grant (SCrIPT grant agreement 819139). Chromium data were obtained on a Neptune MC-ICP-MS acquired with funds from the NCCR PlanetS supported by SNSF grant 51NF40-141881. Maps and some figures were made using Ocean Data View (available at http://odv.awi.de).