1. DFG-Leibniz Center for Surface Process and Climate Studies, Institut für Erd- und Umweltwissenschaften, Universität Potsdam, 14476 Potsdam, Germany;
2. ICMMO, UMR CNRS 8182, Université Paris-Sud 11, F-91405 Orsay, France
3. Earth and Atmospheric Sciences Department, Purdue University, West Lafayette, Indiana 47907
4. Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology, 237-0061 Yokosuka, Japan
5. Department of Integrative Biology, University of California, Berkeley, California 94720
6. Department of Earth Sciences, University of Southern California, Los Angeles, California 90089
7. Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802
8. Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois 60208
9. Department of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, 1790 AB Den Burg (Texel), The Netherlands
10. Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964
11. Unit for Interdisciplinary Chemistry: Synthesis, Analysis, Modelling, University of Nantes, F-44322 Nantes, France
12. School of Oceanography, University of Washington, Seattle, Washington 98195
13. Lehrstuhl für Biologische Chemie, Technische Universität München, 85350 Freising, Germany
14. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125
15. Departments of Geological Sciences and Environmental Studies, University of Colorado, Boulder, Colorado 80309
16. Department of Ecosystem Science and Management, Texas A&M University, College Station, Texas 77843
17. Institute of Agricultural Sciences, ETH Zurich, 8092 Zurich, Switzerland