Trends in soil solution dissolved organic carbon (DOC) concentrations across European forests - Camino Serrano, Marta (Department of Biology. University of Antwerp. Belgium) ; Graf Pannatier, Elisabeth (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Vicca, Sara (Department of Biology. University of Antwerp. Belgium) ; Luyssaert, Sebastiaan (Université Paris-Saclay. Laboratoire des Sciences du Climat et de l'Environnement) ; Jonard, Mathieu (Université catholique de Louvain. Earth and Life Institute. Belgium) ; Ciais, Philippe (Université Paris-Saclay. Laboratoire des Sciences du Climat et de l'Environnement) ; Guenet, Bertrand (Université Paris-Saclay. Laboratoire des Sciences du Climat et de l'Environnement) ; Gielen, Bert (Department of Biology. University of Antwer. Belgium) ; Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Waldner, Peter (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Etzold, Sophia (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Cecchini, Guia (Department of Earth Sciences. University of Florence. Italy) ; Clarke, Nicholas (Norwegian Institute of Bioeconomy Research. Norway) ; Galié, Zoran (Institute of Lowland Forestry and Environment. University of Novi Sad. Serbia) ; Gandois, Laure (EcoLab. Université de Toulouse. France) ; Hansen, Karin (Swedish Environmental Research Institute. Sweden) ; Johnson, Jim (University College Dublin. Ireland) ; Klinck, Uwe (Northwest German Forest Research Institute. Germany) ; Lachmanová, Zora (Forestry and Game Management Research Institute. Czech Republic) ; Lindroos, Antti-Jussi (Natural Resources Institute. Finland) ; Meesenburg, Henning (Northwest German Forest Research Institute. Germany) ; Nieminen, Tiina M. (Natural Resources Institute. Finland) ; Sanders, Tanja G. M. (Thünen Institute of Forest Ecosystems. Germany) ; Sawicka, Kasia (Wageningen University. Netherlands) ; Seidling, Walter (Thünen Institute of Forest Ecosystems. Germany) ; Thimonier, Anne (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Vanguelova, Elena (Alice Holt Research Forest. England) ; Verstraeten, Arne (Research Institute for Nature and Forest (Brusel·les, Bèlgica)) ; Vesterdal, Lars (University of Copenhagen. Department of Geosciences and Natural Resource Management. Denmark) ; Janssens, Ivan (Department of Biology. University of Antwerp, Belgium)