It is a pleasure to acknowledge the support of Drs. Kenneth Bergman, Ramesh Kakar, and Ghassem Asrar of NASA Headquarters through Grants 578-41-60-20, 461-57-37-20, and 148-67-07, and TRMM Grants 622-32-33 and 622-24-27. We are grateful to Dr. Joanne Simpson for her encouragement and Dr. Robert Harriss for his support during his tenure as the science director of NASA’s Mission to Planet Earth. We would also like to thank Genia Brin and Dennis Bungato for assistance in obtaining the 5-day forecast statistics, Dr. Man-Li Wu for a gridded version of Pinker’s surface radiation data, Dr. William Olson for information on error estimates of GPROF retrievals, and Dr. Tadashi Tsuyuki for helpful comments on the manuscript.
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