This work was supported by NASA Grant NAG-1-1803 and the Physical Meteorology Program of the National Science Foundation Grant ATM-9525746. Support for REP comes from the Advanced Study Program at the National Center for Atmospheric Research. The authors would like to thank Dr. Michael McIntyre for originally suggesting this study, as well as Professor James Holton, Drs. R. Garcia and J. Klemp, and three anonymous reviewers for their comments that significantly improved the manuscript.
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