1. Department of Biogeochemical Processes Max Planck Institute for Biogeochemistry Jena Germany
2. Institute of Earth System Sciences Section Soil Science Leibniz Universität Hannover Hannover Germany
3. State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
4. CREAF Barcelona Spain
5. Laboratoire des Sciences du Climat et de l’Environnement Gif‐sur‐Yvette France
6. Laboratório de Radiocarbono Instituto de Física Universidade Federal Fluminense Niterói Brazil
7. Department of Forest Ecology and Management Swedish University of Agricultural Sciences (SLU) Umeå Sweden
8. Unit for Field‐Based Forest Research Swedish University of Agricultural Sciences (SLU) Vindeln Sweden