1. Institute for the Dynamics of Environmental Processes, IDPA-CNR; Venice Italy
2. Department of Environmental Science, Informatics and Statistics; Ca' Foscari University of Venice; Venice Italy
3. School of Forestry and Environmental Studies; Yale University; New Haven Connecticut USA
4. Department of Environmental Sciences; University of Virginia; Charlottesville Virginia USA
5. Max Planck Institute for Meteorology; Hamburg Germany
6. Centre for Ice and Climate, Niels Bohr Institute; University of Copenhagen; Copenhagen Denmark
7. Centro B. Segre; Accademia Nazionale dei Lincei; Rome Italy