This research constituted part of the first author’s doctoral thesis, and was supported by the National Science Foundation under Grant ATM-0432090. We thank Arnaud Czaja and Nikki Privé for assistance with the GCM, which was originally implemented by Olivier Pauluis and Sandrine Bony. Discussions with Alan Plumb, Tapio Schneider, and Masahiro Sugiyama were valuable in the preparation of this work. Comments by Adam Sobel and an anonymous reviewer greatly improved the presentation and content of this paper.
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