Numerical experiments were performed on NCAR’s CRAY YMP supercomputers. Internal review of the manuscript by Jack Herring is gratefully acknowledged, as is the careful editing of the manuscript by James Pasquotto. We thank Prof. Richard Reed for the data used in Figs. 8, 10, and 11. Comments by three anonymous reviewers led to the final version of this paper. This work is supported by NCAR’s Clouds in Climate Program (CCP). The National Center for Atmospheric Research is operated by the University Corporation for Atmospheric Research under sponsorship of the NSF.
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