1. Met Office Hadley Centre; Exeter UK
2. Department of Atmospheric, Oceanic and Planetary Physics; University of Oxford; Oxford UK
3. Canadian Centre for Climate Modelling and Analysis; Environment Canada; Victoria British Columbia Canada
4. Department of Meteorology and Geophysics; University of Vienna; Vienna Austria
5. Cooperative Institute for Research in Environmental Sciences; University of Colorado, and NOAA Earth System Research Laboratory Physical Sciences Division; Boulder Colorado USA
6. Cooperative Institute for Climate and Satellites; NCSU and NOAA's National Climatic Data Center; Asheville North Carolina USA