1. Cultures Environments, Arctique, Représentations, Climat, Observatoire de Versailles Saint-Quentin, Guyancourt, France
2. Laboratoire de Météorologie Dynamique/IPSL, CNRS, Ecole Polytechnique,, Palaiseau, France
3. The Norwegian Meteorological Institute, Oslo, Norway
4. Department of Geography Penn State University, University Park, PA, USA
5. Earth and Environmental Systems Institute Penn State University, University Park, PA, USA