1. Centre de recherche sur la dynamique du système Terre (Geotop) Université du Québec à Montréal C.P. 8888, succursale centre‐Ville Montréal QC H3C 3P8 Canada
2. Plesner, Paleoceanography and Paleoclimate Group, Arctic Research Centre, and iClimate Department of Geoscience Aarhus University Hoegh‐Guldbergs Gade 2 Aarhus DK‐8000 Denmark
3. Department of Geology University at Buffalo 411 Cooke Hall Buffalo NY 14260 USA
4. Department of Estuarine and Delta Systems Royal Netherlands Institute for Sea Research Utrecht University Yerseke The Netherlands
5. Greenland Climate Research Centre Greenland Institute of Natural Resources Nuuk 3900 Greenland
6. Arctic Research Centre Department of Biology Aarhus University Aarhus Denmark
7. Center for Geomicrobiology Department of Biology Aarhus University Ny Munkegade 114‐116 Aarhus DK‐8000 Denmark
8. Department of Marine Geology Leibniz Institute for Baltic Sea Research Seestrasse 15 Rostock 18119 Germany