[1] Univ Freiburg, Fac Environm & Nat Resources, D-79098 Freiburg, Germany
[2] Univ Zurich, Dept Geog, CH-8057 Zurich, Switzerland
[3] Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Uppsala, Sweden
[4] Environm & Climate Change Canada, Climate Res Div, Victoria, BC V8W 2Y2, Canada
[5] Luxembourg Inst Sci & Technol, Catchment & Ecohydrol Res Grp, L-4362 Esch Sur Alzette, Luxembourg