Terry Prowse,^* Knut Alfredsen,^** Spyros Beltaos,^*** Barrie Bonsal,^**** Claude Duguay,^***** Atte Korhola,^****** Jim McNamara,^******* Warwick F. Vincent,^******** Valery Vuglinsky,^********* Gesa A. Weyhenmeyer<sup>**********


*</sup>Terry Prowse () is a senior Research Scientist with Environment Canada and a Professor in the Department of Geography at the University of Victoria. His research focuses on the effects of climate variability and change on cold-regions hydrology, hydro-climatology, and hydro-ecology. Address: Department of Geography, Environment Canada, University of Victoria, Victoria, BC V8P 5C2, Canada. e-mail: terry.prowse@ec.gc.ca
^**Knut Alfredsen is a Professor in hydrology at the Norwegian University of Science and Technology. His main research interests include river ice, cold climate ecohydrology, and environmental impacts of hydropower. Address: Department of Hydraulic and Environmental Engineering, NTNU, 7491, Trondheim, Norway. e-mail: knut.alfredsen@ntnu.no
^***Spyros Beltaos is a senior Research Scientist at the National Water Research Institute of Environment Canada and an Adjunct Professor at the Department of Geography, University of Victoria. His research interests include hydroclimatic and ecological impacts of ice processes in northern rivers and deltas, with emphasis on breakup and ice jams. Address: Aquatic Ecosystem Impacts Research Division, Environment Canada, National Water Research Institute, 867 Lakeshore Rd., Burlington, ON L7R 4A6, Canada. e-mail: spyros.beltaos@ec.gc.ca
^****Barrie Bonsal is a Research Scientist with Environment Canada where he specializes in the assessment of past and projected future climatological impacts on the hydrology and ecology of Canada and the Northern Hemisphere. Address: Environment Canada, National Hydrology Research Centre, 11 Innovation Blvd, Saskatoon, SK S7N 3H5, Canada. e-mail: barrie.bonsal@ec.gc.ca
^*****Claude Duguay is a Professor in the Department of Geography & Environmental Management and Founding Director of the Interdisciplinary Centre on Climate Change at the University of Waterloo. His research interests include climate-lake interactions, remote sensing and numerical modeling of the cryosphere, and northern hydrology. Address: Department of Geography & Environmental Management, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada. e-mail: crduguay@uwaterloo.ca
^******Atte Korhola is a Professor of environmental change at the University of Helsinki and a member of the Environment Panel of the European Academies Science Advisory Council (EASAC). His specialist research interests include climate change and its ecological and societal impacts with particular reference to longer term environmental changes and northern regions. Address: Department of Environmental Sciences, ECRU, University of Helsinki, P.O. Box 65 (Viikinkaari 1), Helsinki 00014, Finland. e-mail: atte.korhola@helsinki.fi
^*******Jim McNamara is a Professor of hydrology at Boise State University in Boise Idaho, USA. His research interests include interactions between catchment hydrologic, geomorphologic, and biologic processes in cold regions. Address: Boise State University, 1910 University Dr., Boise, ID 83703, USA. e-mail: jmcnamar@boisestate.edu
^********Warwick F. Vincent is a Professor of biology and Canada Research Chair at Laval University, Canada, where he is also director of the Centre for Northern Studies (CEN), an inter-interuniversity centre of excellence for research on northern ecosystems and geosystems. He works on the effects of environmental change on polar aquatic ecosystems. Address: Département de Biologie & Centre d'Études Nordiques (CEN), Laval University, Québec City, QC G1V 0A6, Canada. e-mail: warwick.vincent@bio.ulaval.ca
^*********Valery Vuglinsky is a Professor and Deputy Director for Science at the State Hydrological Institute in the Russian Federation; he is also Head of Hydrology Department at St. Petersburg State University. His main research interests include: water resources and water balance, hydrology of lakes and reservoirs, water resources inventory and hydroecology. Address: State Hydrological Institute, 2nd Line 23, 199053 St. Petersburg, Russian Federation. e-mail: vvuglins@vv4218.spb.edu
^**********Gesa A. Weyhenmeyer is an Associate Professor and Senior Lecturer at Uppsala University and the Swedish University of Agricultural Sciences. She is presently a Research Fellow Post at the Royal Swedish Academy of Sciences and focuses her research on global change impacts on aquatic ecosystems. Address: Department of Ecology and Genetics/Limnology, Uppsala University, Norbyvägen 18D, SE 752 36 Uppsala, Sweden. e-mail: gesa.weyhenmeyer@ebc.uu.se