Brit Lisa Skjelkvåle,^* Chris Evans,^** Thorjørn Larssen,^*** Atle Hindar,^**** Gunnar G. Raddum<sup>*****


*</sup>Brit Lisa Skjelkvåle is a research scientist and Head of unit: Environmental Pollutants, Acidification and Liming, at the Norwegian Institute for Water Research (NIVA). She holds a PhD in geology from the University of Oslo. Her special interest is effects of air pollution on freshwater acidification. Her address: Norwegian Institute for Water Research, P.O. Box 173 Kjelsås, N-0411 Oslo, Norway. brit.skjelkvaale@niva.no
^**Chris Evans is a research scientist at Center for Ecology and Hydrology. He holds a PhD in Environmental Sciences, University of East Anglia. His research interests include acidification monitoring, catchment modelling and controls on N and C fluxes to freshwater systems. His address: Centre for Ecology and Hydrology Bangor, Orton Building, Deiniol Road, Bangor, Gwynedd, LL57 2UP, UK. CEV@wpo.nerc.ac.uk
^***Thorjørn Larssen is a research scientist at the Norwegian Institute for Water Research (NIVA) and an associate professor at the University of Oslo. He holds a PhD in chemistry from the University of Oslo. His research interests include acidification monitoring and modelling, uncertainties in environmental modelling, and pollution effects in developing countries. His address: Norwegian Institute for Water Research, P.O. Box 173 Kjelsås, N-0411 Oslo, Norway. thorjorn.larssen@niva.no
^****Atle Hindar is a research scientist and Head of Regional Office South at the Norwegian Institute for Water Research (NIVA). He holds a PhD in chemistry from the University of Oslo. His special interest is acidification, liming strategies and effects of liming. His address: Norwegian Institute for Water Research, Televeien 3, N-4879 Grimstad, Norway. atle.hindar@niva.no
^*****Gunnar G. Raddum is an associate professor at the University of Bergen. He is Head of the unit: Laboratory for Freshwater Ecology and Inland Fisheries, Zoological Institute, UiB. His main interest is effects of acidification, liming and restoration of freshwater ecosystems in general. His address: University of Bergen, Institute of Zoology, Allegt. 41, N-5007 Bergen, Norway. gunnar.raddum@zoo.uib.no