1. Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland.
2. National Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Seattle, WA, USA.
3. Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, USA.
4. Centre for Isotope Research, Faculty of Science and Engineering, University of Groningen, Groningen, Netherlands.
5. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany.
6. Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan.
7. Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA.
8. NOAA National Centers for Environmental Information, Silver Spring, MD, USA.
9. NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway.
10. Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway.
11. LOCEAN, CNRS, Sorbonne Université, Paris, France.
12. National Oceanic and Atmospheric Administration, Arctic Research Program, Silver Spring, MD, USA.
13. Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan.
14. Instituto de Investigaciones Marinas, CSIC (IIM-CSIC), Vigo, Spain.
15. Department of Oceanography, University of Hawai`i at Manoa, Honolulu, HI, USA.
16. GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.
17. National Oceanic and Atmospheric Administration, Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, USA.