1. Department for Innovation in Biological Agro-Food and Forest Systems, University of Tuscia, Viterbo, Italy, and IAFES, Euro-Mediterranean Center on Climate Change, Viterbo, Italy;
2. Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland;
3. Thünen Institute of Climate-Smart Agriculture, Braunschweig, Germany;
4. Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland;
5. Institute of Research on Terrestrial Ecosystems, National Research Council, Porano, Italy;
6. Fundación Centro de Estudios Ambientales del Mediterráneo, Paterna, Valencia, Spain;
7. Centre for Isotope Research, University of Groningen, Groningen, Netherlands;
8. Department of Biology, University of Antwerp, Wilrijk, Belgium;
9. Flanders Marine Institute, Ostend, Belgium;
10. Institut für Umweltphysik, Heidelberg University, Heidelberg, Germany;
11. National Oceanography Centre, Southampton, United Kingdom;
12. Centre for Agrometeorological Research, German Meteorological Service, Braunschweig, Germany;
13. Max-Planck-Institute for Biogeochemistry, Jena, Germany;
14. Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki, Finland;
15. ICOS ERIC, Carbon Portal, Lund, Sweden;
16. Head Office, Integrated Carbon Observation System European Research Infrastructure Consortium, Helsinki, Finland;
17. Department of Environmental Sciences, Wageningen University and Research, Wageningen, Netherlands;
18. Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden;
19. INRAE, ISPA, Villenave d’Ornon, France;
20. Agroscope, Research Division Agroecology and Environment, Zurich, Switzerland;
21. Atmosphere and Climate Department, Norwegian Institute for Air Research, Kjeller, Norway;
22. Department of Matter and Energy Fluxes, Global Change Research Institute, CAS, Brno, Czech Republic;
23. Department of Environmental Engineering, Technical University of Denmark, Lyngby, Denmark;
24. Université Paris-Saclay, CEA, CNRS, UVSQ, Laboratoire des Sciences du Climat et de l’Environnement (LSCE/IPSL), Gif-sur-Yvette, France;
25. Institut of Meteorology and Climate Research, Karlsruhe Institut of Technology, Karlsruhe, Germany;
26. Bioeconomy and Environment, Natural Resources Institute Finland, Helsinki, Finland;
27. Climate Department, Norwegian Research Centre, Bergen, Norway;
28. Laboratory for Air Pollution/Environmental Technology, Duebendorf, Switzerland;
29. Chemical Oceanography, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, and NORCE Norwegian Research Centre AS, Bergen, Norway;
30. College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom;
31. Institute for Atmospheric and Earth System Research, and Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland