1. Cooperative Institute for Research in Environmental SciencesUniversity of Colorado Boulder Boulder CO USA
2. Global Monitoring DivisionNOAA Earth System Research Laboratory Boulder CO USA
3. Department of Meteorology and Bert Bolin Centre for Climate ResearchStockholm University Stockholm Sweden
4. Alfred Wegener Institute, Helmholtz Centre for Polar and Marie Research Potsdam Germany
5. British Antarctic SurveyNational Environmental Research Council Cambridge UK
6. Department of Atmospheric and Oceanic SciencesUniversity of Colorado Boulder CO USA
7. Department of GeographyUniversity of Liège Liège Belgium
8. Department of Environmental MeteorologyUniversity of Trier Trier Germany
9. Physical Sciences DivisionNOAA Earth System Research Laboratory Boulder CO USA
10. Met Office Exeter UK