1. Physics of Aquatic Systems Laboratory, Margaretha Kamprad Chair, EPFL, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland
2. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters − Research and Management, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland
3. University of Zurich, Department of Geography, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
4. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters − Research and Management, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland