We are grateful for the support received through NOAA Grant NA17RJ1231 and NASA Grants NNG05GR40G and NNG06GC85G. The views expressed herein are those of the authors and do not necessarily reflect the views of NOAA and NASA. We would also like to thank Masao Kanamitsu for his advice on the R2, Martin Olivera, Jack Ritchie, and Patrick Tripp for technical support, and the three reviewers for their helpful comments.
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