1. Department of Geography, University of Zurich, Zurich, Switzerland
2. Department of Geography, University of Zurich, Zurich, Switzerland, and Research Applications Laboratory, National Center for Atmospheric Research, Boulder, Colorado, and Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom
3. Department of Geography, University of Zurich, Zurich, Switzerland, and Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden