1. GFZ German Research Centre for Geosciences Potsdam14473Germany
2. Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA02543USA
3. Scottish Universities Environmental Research Centre East KilbrideG75 0QFUK
4. Department of Geoscience University of Wisconsin Madison WI53706USA
5. School of Physical Sciences Open University Milton KeynesMK7 6AAUK
6. Department of Geology University of Maryland College Park MD20742USA
7. Department of Geological Sciences University of Cape Town Rondebosch7701South Africa
8. National Environmental Isotope FacilityBritish Geological Survey KeyworthNG12 5GGUK
9. Bristol Isotope Group School of Earth Sciences University of Bristol BristolBS8 1RJUK
10. Faculty of Geosciences & MARUM – Center for Marine Environmental Sciences University of Bremen Bremen28359Germany
11. Geowissenschaftliches Zentrum Universität Göttingen Göttingen37077Germany