1. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters - Research and Management; Kastanienbaum Switzerland
2. Yigal Allon Kinneret Limnological Laboratory; Israel Oceanographic and Limnological Research; Migdal Israel
3. Aquatic Physics Group; Department F.-A. Forel for Environmental and Aquatic Sciences (DEFSE), Section of Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, Uni Carl Vogt, Geneva 4; Switzerland