1. College of Earth, Ocean and Atmospheric Science, Oregon State University , Corvallis 97330 , USA
2. Bureau of Meteorology , Docklands, Victoria 3008 , Australia
3. CSIRO Environment , Hobart, Tasmania, 7000 , Australia
4. School of Marine and Environmental Affairs, University of Washington , Seattle, Washington 98105 , USA
5. The Nature Conservancy , Seattle, Washington 98121 , USA