Sylvain Kuppel^1,2, Doerthe Tetzlaff^3,4, Marco P Maneta⁵ and Chris Soulsby^2,4, (1)Institut de Physique du Globe de Paris / CNRS, Paris, France, (2)University of Aberdeen, Northern Rivers Institute, Aberdeen, United Kingdom, (3)Humboldt University of Berlin, Berlin, Germany, (4)Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany, (5)University of Montana, Geosciences, Missoula, MT, United States