This research is supported by NOAA’s Office of Global Programs Grant NA17RJ1228#15 and by NASA’s Precipitation Program Grant NAG5-13694. The authors thank W. Berg and A. Rapp for helpful comments and discussions. The TRMM datasets (1B01 and 2A23) were provided by the National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC). The SST dataset retrieved from TMI was obtained from the Remote Sensing Systems (RSS; at the web Site http://www.ssmi.com/tmi/tmi_browse.html), sponsored by NASA’s Earth Science Information Partnerships (ESIP)—a federation of information sites for Earth Science—and by NASA’s TRMM Science Team.
Chen, S. S., , R. A. Houze Jr., , and B. E. Mapes, 1996: Multiscale variability of deep convection in relation to large-scale circulation in TOGA COARE. J. Atmos. Sci., 53 , 1380–1409.
Del Genio, A. D., , and W. Kovari, 2002: Climatic properties of tropical precipitating convection under varying environmental conditions. J. Climate, 15 , 2597–2615.
Halverson, J. B., , T. Rickenbach, , B. Roy, , H. Pierce, , and E. Williams, 2002: Environmental characteristics of convective systems during TRMM-LBA. Mon. Wea. Rev., 130 , 1493–1509.
Houze Jr., R. A., , and C-P. Cheng, 1977: Radar characteristics of tropical convection observed during GATE: Mean properties and trends over the summer season. Mon. Wea. Rev., 105 , 964–980.
Inoue, T., , and K. Aonashi, 2000: A comparison of cloud and rainfall information from instantaneous visible and infrared scanner and precipitation radar observations over a frontal zone in east Asia during June 1998. J. Appl. Meteor., 39 , 2292–2301.
Johnson, R. H., , T. M. Rickenbach, , S. A. Rutledge, , P. E. Ciesielski, , and W. H. Schubert, 1999: Trimodal characteristics of tropical convection. J. Climate, 12 , 2397–2418.
Kummerow, C., , W. Barnes, , T. Kozu, , J. Shiue, , and J. Simpson, 1998: The Tropical Rainfall Measuring Mission (TRMM) sensor package. J. Atmos. Oceanic Technol., 15 , 809–817.
Lindzen, R. S., , M-D. Chou, , and A. Y. Hou, 2001: Does the earth have an adaptive infrared iris? Bull. Amer. Meteor. Soc., 82 , 417–432.
López, R. E., 1976: The radar characteristics of the cloud populations of tropical disturbances in the northwest Atlantic. Mon. Wea. Rev., 104 , 268–283.
Machado, L. A. T., , and W. B. Rossow, 1993: Structural characteristics and radiative properties of tropical cloud clusters. Mon. Wea. Rev., 121 , 3234–3260.
Machado, L. A. T., , M. Desbois, , and J-Ph Duvel, 1992: Structural characteristics of deep convective systems over tropical Africa and the Atlantic ocean. Mon. Wea. Rev., 120 , 392–405.
Machado, L. A. T., , W. B. Rossow, , R. L. Guedes, , and A. W. Walker, 1998: Life cycle variations of mesoscale convective systems over the Americas. Mon. Wea. Rev., 126 , 1630–1654.
Mapes, B. E., , and R. A. Houze Jr., 1993: Cloud clusters and superclusters over the oceanic warm pool. Mon. Wea. Rev., 121 , 1398–1415.
Masunaga, H., , T. Iguchi, , R. Oki, , and M. Kachi, 2002: Comparison of rainfall products from TRMM Microwave Imager and Precipitation Radar. J. Appl. Meteor., 41 , 849–862.
Mohr, K. I., , and E. J. Zipser, 1996: Mesoscale convective systems defined by their 85-GHz ice scattering signature: Size and intensity comparison over tropical oceans and continents. Mon. Wea. Rev., 124 , 2417–2437.
Nesbitt, S. W., , E. J. Zipser, , and D. J. Cecil, 2000: A census of precipitation features in the Tropics using TRMM: Radar, ice scattering, and lightning observations. J. Climate, 13 , 4087–4106.
Petersen, W. A., , S. W. Nesbitt, , R. J. Blakeslee, , R. Cifelli, , P. Hein, , and S. A. Rutledge, 2002: TRMM observations of intraseasonal variability in convective regimes over the Amazon. J. Climate, 15 , 1278–1294.
Ramanathan, V., , and W. Collins, 1991: Thermodynamic regulation of ocean warming by cirrus clouds deduced from observations of the 1987 El Niño. Nature, 351 , 27–32.
Rickenbach, T. M., , and S. A. Rutledge, 1998: Convection in TOGA COARE: Horizontal scale, morphology, and rainfall production. J. Atmos. Sci., 55 , 2715–2729.
Schumacher, C., , and R. A. Houze Jr., 2003: The TRMM precipitation radar’s view of shallow, isolated rain. J. Appl. Meteor., 42 , 1519–1524.
Short, D. A., , and K. Nakamura, 2000: TRMM radar observations of shallow precipitation over the tropical oceans. J. Climate, 13 , 4107–4124.
Takayabu, Y. N., 2002: Spectral representation of rain profiles and diurnal variations observed with TRMM PR over the equatorial area. Geophys. Res. Lett., 29 .1584, doi:10.1029/2001GL014113.
TRMM PR Team, 2000: Tropical Rainfall Measuring Mission (TRMM) precipitation radar algorithm instruction manual Version 2.0. NASDA/NASA, 115 pp. [Available online at http://www.eorc.jaxa.jp/TRMM/document/pr_manual/pr_manual2.pdf.].
Williams, E., and Coauthors, 2002: Contrasting convective regimes over the Amazon: Implications for cloud electrification. J. Geophys. Res., 107 .8082, doi:10.1029/2001JD000380.
Williams, M., , and R. A. Houze Jr., 1987: Satellite-observed characteristics of winter monsoon cloud clusters. Mon. Wea. Rev., 115 , 505–519.