L. Johansson,^* J. Temnerud,^** J. Abrahamsson,^*** D. Berggren Kleja<sup>****


*</sup>L. Johansson works as an international project manager at Lantmäteriet (The Swedish mapping, cadastral and land registration authority). She holds a MSc in aquatic and environmental engineering and wrote her thesis about long-term trends in Lake Mälaren. She has previously worked as a consultant at Sweco Environment. Address: The Swedish Mapping, Cadastral and Land Registration Authority, 801 82 Gävle, Sweden. e-mail: linda.johansson@lm.se
^**J. Temnerud () is currently a post doc at the Swedish University of Agricultural Sciences, in collaboration with the Swedish Meteorological and Hydrological Institute. He holds a PhD in environmental sciences from the Örebro University. His special interests are spatial and temporal variation 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. e-mail: Johan.Temnerud@vatten.slu.se
^***J. Abrahamsson is responsible for water and sanitation in the municipality of Lysekil. She holds a MSc in aquatic and environmental engineering and has previously worked as a research engineer at Stockholm Water Company where she focused on drinking water and water supply related issues. Address: LEVA I Lysekil AB, P.O. Box 36, 453 21 Lysekil, Sweden. e-mail: josefin@levailysekil.se
^****D. Berggren Kleja is professor in soil chemistry at Swedish University of Agricultural Sciences in Uppsala. He holds a PhD in plant ecology from Lund University. He is currently carrying out research on how climatic variables, tree species and nitrogen deposition are affecting the production and transport of dissolved organic matter in forest soils. Address: Department of Soil and Environment, Swedish University of Agricultural Sciences, P.O. Box 7001, 750 07 Uppsala, Sweden. e-mail: dan.berggren@mark.slu.se