1. Department of Applied Mathematics University of Colorado Boulder Boulder CO USA
2. Geophysical Fluid Dynamics Laboratory National Oceanic and Atmospheric Administration Princeton NJ USA
3. Atmospheric and Oceanic Sciences Princeton University Princeton NJ USA
4. Climate and Global Dynamics Laboratory National Center for Atmospheric Research Boulder CO USA
5. NOAA Physical Sciences Laboratory Boulder CO USA
6. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA