1. Department of Ocean Systems NIOZ Royal Netherlands Institute for Sea Research Texel 1790 AB 59 The Netherlands
2. myStandards GmbH Kiel 24118 Germany
3. Institute for Geosciences Johannes Gutenberg‐Universität Mainz Mainz 55128 Germany
4. Lamont‐Doherty Earth Observatory Department of Earth and Environmental Sciences Columbia University Palisades NY 10964 USA
5. Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung (AWI) Bremerhaven Germany
6. School of Ocean and Earth Science National Oceanography Centre Southampton University of Southampton Southampton UK
7. GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel 24148 Germany
8. MARUM University of Bremen Bremen 28334 Germany
9. Department of Chemical and Geological Sciences University of Modena and Reggio Emilia Via G. Campi Modena 103 ‐ 41125 Italy
10. Department of Cultural Heritage University of Bologna Ravenna Italy
11. Stable Isotope Laboratory University of California, Davis Davis California USA
12. IsoAnalysis UG Berlin Germany
13. Department Earth Science Utrecht University Utrecht 3584 CS 8 Netherlands