This work was supported by DOE ARM grant DE-AI0297ER62359 and TOGA COARE grants from NSF NSF01. We would, of course, like to acknowledge the technical staff who made the TOGA COARE measurements possible. Discussions with H. Cole, D. Carlson, J.-H. Wang, R. Johnson, C. Fairall, and B. Lesht have been very beneficial. A. Paukkunen and T. Laine are acknowledged on the development and implementation of the correction procedure. We would like to acknowledge the numerous investigators and forecasters who noted problems with the radiosonde humidity measurements during TOGA COARE, which partially led to the development of this correction procedure. In particular, we acknowledge the efforts of P. Ciesielski, R. Johnson, P. LeMone, C. Lucas, and E. Zipser whose research efforts clearly articulated the need for this correction. We also thank L. Verstraete, who kept and archived unused sondes from the COARE project, which upon discovery led to the bias in calibration chamber tests. Finally, we thank C. Zender, who provided the radiative code, and H. Cole, D. Carlson, P. LeMone, and two anonymous reviewers for helpful suggestions concerning the manuscript. Careful editing of the manuscript by C. Darnell is also acknowledged.
Barnes, G., and K. Sieckman, 1984: The environment of fast- and slow-moving tropical mesoscale convective cloud lines. Mon. Wea. Rev.,112, 1782–1794.
Barr, A. G., and A. K. Betts, 1997: Radiosonde boundary layer budgets above a boreal forest. J. Geophys. Res.,102, 29 205–29 212.
Boucher, O., 1995: GCM estimate of the indirect aerosol forcing using satellite-retrieved cloud droplet effective radii. J. Climate,8, 1403–1409.
Briegleb, B., 1992: Delta-Eddigton approximation for solar radiation in the NCAR Community Climate Model. J. Geophys. Res.,97, 7603–7612.
Chou, M.-D., and W. Zhao, 1997: Estimation and model validation of surface solar radiation and cloud radiative forcing using TOGA COARE measurements. J. Climate,10, 610–620.
Colby, F. P. J., 1983: Effects of boundary-layer modification on the initiation of convection during AVE-SESAME, 1979. Mesoscale Meteorology—Theories, Observations, and Models, D. K. Lilly and T. Gal-Chen, Eds., NATO ASI Series C, Vol. 114, Kluwer Academic, 709–710.
Cole, H., and E. Miller, 1995: A correction for low-level radiosonde temperature and relative humidity measurements. Preprints, Ninth Symp. on Meteorological Observations and Instrumentation, Charlotte, NC, Amer. Meteor. Soc., 32–36.
——, and ——, 1999: Correction and re-calculation of humidity data from TOGA COARE radiosondes and development of humidity correction algorithms for global radiosondes data. Proc. WCRP COARE-98 Conf., WCRP 107, WMO/TD-940, Boulder, CO, 139–141.
Crook, N. A., 1996: Sensitivity of moist convection forced by boundary layer processes to low-level thermodynamic fields. Mon. Wea. Rev.,124, 1767–1785.
Dabberdt, W. F., and T. W. Schlatter, 1996: Research opportunities from emerging atmospheric observing and modeling capabilities. Bull. Amer. Meteor. Soc.,77, 305–323.
DeMott, C. A., and S. Rutledge, 1998: The vertical structure of TOGA COARE convection. Part I: Radar echo distributions. J. Atmos. Sci.,55, 2730–2747.
Doherty, G., and R. Newell, 1984: Radiative effects of changing atmospheric water vapour. Tellus,36B, 149–162.
Ebert, E., and J. A. Curry, 1992: A parameterization of ice cloud optical properties for climate models. J. Geophys. Res.,97, 3831–3836.
Emanuel, K., and Coauthors, 1995: Report of the first Prospectus Development Team of the U.S. Weather Research Program to NOAA and the NSF. Bull. Amer. Meteor. Soc.,76, 1194–1208.
Gutzler, D. S., 1993: Uncertainties in climatological tropical humidity profiles: Some implications for estimating the greenhouse effect. J. Climate,6, 978–982.
Hack, J. J., and J. A. Pedretti, 2000: Assessment of Solution Uncertainties in Single-Column Modeling Frameworks. J. Climate,13, 352–365.
Harries, J. E., 1997: Atmospheric radiation and atmospheric humidity. Quart. J. Roy. Meteor. Soc.,123, 2173–2186.
Johnson, R. H., and P. E. Ciesielski, 2000: Rainfall and Radiative Heating Rates from TOGA COARE Atmospheric Budgets. J. Atmos. Sci.,57, 1497–1514.
Kiehl, J. T., J. J. Hack, and B. P. Briegleb, 1994: The simulated earth radiation budget of the NCAR CCM2 and comparisons with the Earth Radiation Budget Experiment (ERBE). J. Geophys. Res,99, 20 815–20 827.
——, ——, G. B. Bonan, B. A. Boville, D. L. Williamson, and P. J. Rasch, 1998: The National Center for Atmospheric Research Community Climate Model: CCM3. J. Climate,11, 1131–1149.
Krueger, S. K., and J. E. Burks, 1998: Radiative fluxes and heating rates during TOGA COARE over the intensive flux array. Proc. Eigth Atmospheric Radiation Measurement (ARM) Science Team Meeting, Tucson, AZ, Department of Energy, 400–402.
LeMone, M., E. Zipser, and S. Trier, 1998: The role of environmental shear and thermodynamic conditions in determining the structure and evolution of mesoscale convective systems during TOGA COARE. J. Atmos. Sci.,55, 3493–3518.
Lin, X., and R. H. Johnson, 1996: Heating, moistening, and rainfall over the western Pacific warm pool during TOGA COARE. J. Atmos. Sci.,53, 3367–3383.
Lindzen, R., 1990: Some coolness concerning global warming. Bull. Amer. Meteor. Soc.,71, 288–299.
Lucas, C., and E. J. Zipser, 2000: Environmental variability during TOGA COARE. J. Atmos. Sci.,57, 2333–2350.
Miloshevich, L. M., H. Vömel, A. Paukkunen, A. J. Heymsfield, S. J. Oltmans, 2000: Characterization and correction of relative humidity measurements from Vaisala RS80-A radiosondes at cold temperatures. J. Atmos. Oceanic Technol., in press.
Moncrieff, M., S. Krueger, D. Gregory, J.-L. Redelsperger, and W.-K. Tao, 1997: GEWEX Cloud System Study (GCSS) Working Group 4: Precipitating convective cloud systems. Bull. Amer. Meteor. Soc.,78, 831–844.
Parsons, D., and Coauthors, 1994: The integrated sounding system: Description and preliminary observations from TOGA COARE. Bull. Amer. Meteor. Soc.,79, 553–567.
——, K. Yoneyama, and J.-L. Redelsperger, 2000: The evolution of the atmosphere–ocean systems over the tropical western Pacific following the arrival of a dry intrusion. Quart. J. Roy. Meteor. Soc.,126, 517–548.
Raval, A., and V. Ramanathan, 1989: Observational determination of the greenhouse effect. Nature,342, 758–761.
Raymond, D. J., 1995: Regulation of moist convection over the west Pacific warm pool. J. Atmos. Sci.,52, 3945–3959.
Rickenbach, T. M., and S. Rutledge, 1998: Convection in TOGA COARE: Horizontal scale, morphology, and rainfall production. J. Atmos. Sci.,55, 2715–2729.
Rind, D., 1998: Just add water vapor. Science,281, 1152–1153.
Schimel, D., and Coauthors 1995: Radiative forcing of climate change. Climate Change 1995: The Science of Climate Change, J. T. Houghton et al., Eds., Cambridge University Press, 65–131.
Short, D. A., P. A. Kucera, B. S. Ferrier, J. C. Gerlach, S. A. Rutledge, and O. W. Thiele, 1997: Shipboard radar rainfall patterns within the TOGA COARE IFA. Bull. Amer. Meteor. Soc.,78, 2817–2836.
Simmons, A. J., A. Untch, C. Jakob, P. Kallberg, and P. Unden, 1999:Stratospheric water vapour and tropical tropopause temperatures in ECMWF analyses and multi-year simulations. Quart. J. Roy. Meteor. Soc.,125, 353–386.
Slingo, A., 1989: GCM parameterization for the short-wave radiative properties of water clouds. J. Atmos. Sci.,46, 1419–1427.
Smith, T. L., and S. G. Benjamin, 1993: Impact of network wind profiler data on a 3-h data assimilation system. Bull. Amer. Meteor. Soc.,74, 801–807.
Soden, B., and J. Lanzante, 1996: An assessment of satellite and radiosonde climatologies of upper-tropospheric water vapor. J. Climate,9, 1235–1250.
Spencer, R. W., and W. D. Braswell, 1997: How dry is the tropical free troposphere? Implications for global warming theory. Bull. Amer. Meteor. Soc.,78, 1097–1106.
Waliser, D., W. D. Collins, and S. P. Anderson, 1996: An estimate of the surface shortwave cloud forcing over the western Pacific during TOGA COARE. Geophys. Res. Lett.,23, 519–522.
Weckwerth, T. M., V. Wulfmeyer, R. M. Wakimoto, R. M. Hardesty, J. W. Wilson, and R. M. Banta, 1999: NCAR/NOAA lower tropospheric water vapor workshop. Bull. Amer. Meteor. Soc.,80, 2339–2357.
Zhang, C., and M.-D. Chou, 1999: Variability of water wapor, infrared radiative cooling, and atmospheric instability for deep convection in the equatorial western Pacific. J. Atmos. Sci.,56, 711–723.
Zipser, E. J., and R. H. Johnson, 1998: Systematic errors in radiosonde humidities a global problem? Preprints, 10th Symp. on Measurements, Observations and Instrumentation, Phoenix, AZ, Amer. Meteor. Soc., 72–73.