1. Géosciences Environnement Toulouse, UMR5563─IRD UR 234, Université Paul Sabatier, 14 Avenue Edouard Belin 31400 Toulouse, France
2. Environmental Geosciences, University of Basel, Bernoullistrasse 30, 4056 Basel, Switzerland
3. ISTerre, CNRS, IRD, IFSTTAR, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, 38000 Grenoble, France
4. Department of Water Resources and Drinking Water, Eawag, Ueberlandstrasse 133, 8600 Dübendorf, Switzerland
5. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Universitaetstrasse 16, 8092 Zurich, Switzerland
6. Department of Earth and Atmospheric Sciences, University of Nebraska─Lincoln, 68588 Lincoln, Nebraska, United States
7. Division of Earth and Ocean Sciences, Duke University, 27708 Durham, North Carolina, United States