ISCCP cloud data were obtained from the NASA Langley Research Center EOSDIS Distributed Active Archive Center. The linear model was provided, along with helpful advice, by J. Whitaker of CDC. Heating rates calculated from the residual of the thermodynamical equation were provided by M. Newman of CDC. We wish also to acknowledge helpful comments by our colleagues at CDC and by anonymous reviewers. This research was supported in part by a Pan American Climate Studies Grant from NOAA’s Office of Global Programs.
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