The authors thank Steve Klein and Robert Wood for their valuable discussion and comments. ECMWF ERA-40 data used in this study were obtained from the data systems section at the National Center for Atmospheric Research. The ISCCP D2 data were obtained from the International Satellite Cloud Climatology Project data archives maintained by the Atmospheric Sciences Data Center at NASA Langley Research Center. This research was a part of the Low-Latitude Cloud Feedbacks Climate Process Team, and was partially supported by National Science Foundation, Grant ATM-0336849. Part of this work was performed under the auspices of the U.S. Department of Energy by the Lawrence Livermore National Laboratory under Contract DE-AC5207NA27344. This work has been supported by the National Science Foundation Science and Technology Center for Multi-Scale Modeling of Atmospheric Processes, managed by Colorado State University under Cooperative Agreement ATM-0425247.
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