Support for this research was provided for CKW by the NCAR Geophysical Statistics Project, sponsored by the National Science Foundation (NSF) under Grant DMS93-12686. Support for RFM and CKW is provided by the NCAR NSCAT Science Working Team cooperative agreement with NASA/JPL. We are grateful to Dr. Jielun Sun for providing the NCAR Electra data, to Mr. Jan Morzel for alerting us to recent results with NSCAT spectra, and to Dr. E. Lindborg for providing preprints of his recent work. We have benefited from three constructive reviews including comments from Dr. G. K. Vallis, and from discussions with Drs. K. S. Gage, R. M. Kerr, J. C. McWilliams, and J. J. Tribbia. NCAR is supported in part by the NSF.
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