The authors are grateful to John Allen, Roger Samelson, and Murray Levine for helpful comments and suggestions. Alexander Kurapov helped with the implementation of the open boundary conditions. This research was supported by the National Science Foundation under Grant OCE-9907854. Author RC acknowledges support by the Brazilian National Research Council (CNPq Grant 200147/01-3). Additional support was provided by the National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Commerce Award NA03NES4400001 to Oregon State University. The statements, findings, conclusions, and recommendations are those of the authors and do not necessarily reflect the views of NOAA or the Department of Commerce.
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