This work was made possible by the NOAA Office of Global Programs and National Science Foundation through their support of the EPIC project. PZ acknowledges additional support from NASA Grant NNG04GF89G. Work by BEM and JL was supported by NSF Grants ATM-0097116, ATM-0336790, and ATM-0407559. The helpful comments of two anonymous reviewers, Dr. David Nolan, editor Dr. Anthony DelGenio, and Dr. Richard Johnson are greatly appreciated. Paul Ciesielski provided the mean TOGA COARE relative humidity sounding shown in Fig. 4. These excellent EPIC datasets came from a great deal of thankless work by many people, and are freely available through the Web site of the National Center for Atmospheric Research’s Joint Office for Science Support (http://www.joss.ucar.edu/epic). The HYSPLIT model is publicly available through the URL (http://www.arl.noaa.gov/ready/hysplit4.html). The NCEP reanalysis data were obtained from the Climate Diagnostics Center through its Web site (http://www.cdc.noaa.gov).
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