1. Climate and Environmental Physics; University of Bern; Bern Switzerland
2. Oeschger Centre for Climate Change Research; University of Bern; Bern Switzerland
3. Institute for Atmospheric and Climate Science; ETH; Zurich Switzerland
4. Institute of Geography; University of Bern; Bern Switzerland
5. Physikalisch-Meteorologisches Observatorium Davos and World Radiation Center; Davos Switzerland
6. Swiss Federal Institute of Aquatic Science and Technology; Dübendorf Switzerland