1. Department of Applied Mathematics University of Colorado Boulder CO USA
2. Department of Earth and Environmental Sciences Lamont Doherty Earth Observatory of Columbia University Palisades NY USA
3. Department of Physical Oceanography Woods Hole Oceanographic Institution Woods Hole MA USA
4. Climate and Global Dynamics Division National Center for Atmospheric Research Boulder CO USA
5. Center for Atmosphere Ocean Science Courant Institute of Mathematical Sciences New York University New York NY USA