1. Eawag, Surface Waters-Research and Management; Kastanienbaum Switzerland
2. Institute of Biogeochemistry and Pollutant Dynamics; ETH Zurich; Zurich Switzerland
3. Department of Geology and Geophysics; Yale University; New Haven Connecticut USA
4. Institute for Coastal Research; Helmholtz-Zentrum Geesthacht; Geesthacht Germany
5. Physics of Aquatic Systems Laboratory-Margaretha Kamprad Chair of Environmental Science and Limnology; ENAC, EPFL; Lausanne Switzerland