Mattias Winterdahl,^* Johan Temnerud,^** Martyn N. Futter,^*** Stefan Löfgren,^**** Filip Moldan,^***** Kevin Bishop<sup>******


*</sup>Mattias Winterdahl () is a doctoral student at the Swedish University of Agricultural Sciences (SLU) in Uppsala. His research interest is in hydrology and biogeochemistry with a focus on organic carbon in natural waters. He holds a M.Sc. in Geosciences from Stockholm University. Address: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 750 07 Uppsala, Sweden. e-mail: mattias.winterdahl@slu.se
^**Johan Temnerud is currently an Assistant Professor at SLU. He has a Ph.D. in environmental sciences from Örebro University. His special interests are spatial and temporal variations of aquatic humic substances in surface water, especially boreal streams. Address: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 750 07 Uppsala, Sweden. Address: Research Department, Swedish Meteorological and Hydrological Institute, Folkborgsvägen 1, 601 76 Norrköping, Sweden. e-mail: johan.temnerud@slu.se
^***Martyn N. Futter is a Biogeochemical Modeler. He is currently an Assistant Professor in the Department of Aquatic Sciences and Assessment at SLU, Uppsala. He received his Ph.D. from Trent University in Canada. His research interests include nutrients, carbon, and contaminant cycling in natural and semi-natural landscapes and the interplay between science and policy. Address: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 750 07 Uppsala, Sweden. e-mail: martyn.futter@slu.se
^****Stefan Löfgren is an Associate Professor at the department of Aquatic Sciences and Assessment, SLU, Uppsala. His research focuses on the acidification, eutrophication, and DOC dynamics of soils and surface waters in connection with forestry and agriculture. Address: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 750 07 Uppsala, Sweden. e-mail: stefan.lofgren@slu.se
^*****Filip Moldan is head of the Biogeochemistry and Soils section at IVL Swedish Environmental Research Institute. His research focuses on acidification and eutrophication in terrestrial and aquatic ecosystems, interactions between climate change and land use using field-scale experiments and biogeochemical modeling. Address: IVL Svenska Miljöinstitutet AB, Box 21060, 100 31 Stockholm, Sweden. e-mail: filip.moldan@ivl.se
^******Kevin Bishop is a Professor of Environmental Assessment at SLU, and Aquatic Climatology at Uppsala University. His Ph.D. is from the University of Cambridge. He has explored how water moves carbon, sulfur, mercury and other substances of interest through catchments. Address: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 750 07 Uppsala, Sweden. Address: Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden. e-mail: kevin.bishop@geo.uu.se