B. P. Kirtman and E. K. Schneider acknowledge support from NSF Grant ATM-9321354, NOAA Grant NA46GP0217, and NASA Grant NAGW5213. E. K. Schneider was also supported by NSF Grant ATM-9520579. R. S. Lindzen’s efforts were supported by Grants 914441-ATM from the National Science Foundation, NAG5-6304 from the National Aeronautics and Space Administration, and DE-FG02-93ER61673 from the Department of Energy. We thank Jim Kinter, Uma Bhatt, and anonymous reviewers for useful suggestions.
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