1. Institute for Advanced Sustainability Studies, Berlinerstrasse 130, 14467 Potsdam, Germany
2. Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY 13244, USA
3. Institute of Meteorology and Climatology, University of Natural Resources and Life Sciences, Vienna, Gregor-Mendel Strasse 33, 1180 Vienna, Austria
4. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA