1. National Center for Atmospheric Research Boulder CO USA
2. Department of Atmospheric and Ocean Sciences Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA
3. Department of Environmental Sciences Rutgers University New Brunswick NJ USA
4. NASA Goddard Institute for Space Studies New York NY USA
5. Center for Climate Systems Research Columbia University New York NY USA
6. Potsdam Institute for Climate Impact Research (PIK) Potsdam Germany
7. Department of Atmospheric and Oceanic Sciences Institute of Arctic and Alpine Research University of Colorado Boulder CO USA
8. Institut de Ciència i Tecnologia Ambientals (ICTA) Universitat Autònoma de Barcelona Cerdanyola del Vallès Spain