Fabio Benedetti, ETH Zurich Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, Meike Vogt, ETH Zurich, Environmental Systems Science, Zurich, Switzerland, Nicolas Gruber, ETH Zurich, Environmental Physics, Zurich, Switzerland, Damiano Righetti, Swiss Federal Institute of Technology (ETH), Biogeochemistry and Pollutant Dynamics, Zurich, Switzerland and Thomas L Froelicher, Princeton Univ, Princeton, NJ, United States