Insights into the importance of cloud vertical structure in climate

Multi-year surface and satellite observations of cloud amounts have been combined to estimate the full three-dimensional structure of clouds for a three-layer atmosphere. This analysis provides new insight into the vertical structure of clouds and the interactions with atmospheric radiation. For instance, a simple vertical overlap parameter has been derived which is very consistent with general climatology. In addition radiative transfer model calculations show that both the mean net heating rates within the atmosphere and the perturbations of cloud radiative forcing at the top are very sensitive to variations in the overlap parameter.

[1]  Stephen A. Klein,et al.  The role of vertically varying cloud fraction in the parametrization of microphysical processes in the ECMWF model , 1999 .

[2]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[3]  Stephen G. Warren,et al.  Edited synoptic cloud reports from ships and land stations over the globe , 1996 .

[4]  David M. Winker.  Global Observations of Aerosols and Clouds from Combined Lidar and Passive Instruments to Improve Radiation Budget and Climate Studies , 1999 .

[5]  William B. Rossow,et al.  Validation of ISCCP Cloud Detections , 1993 .

[6]  H. Hendon,et al.  Calculating Monthly Radiative Fluxes and Heating Rates fromMonthly Cloud Observations , 1998 .

[7]  B. Weare.  Combined Satellite- and Surface-Based Observations of Clouds , 1999 .

[8]  William B. Rossow,et al.  Comparison of ISCCP and Other Cloud Amounts , 1993 .

[9]  C. J. Hahn,et al.  Extended Edited Synoptic Cloud Reports from Ships and Land Stations Over the Globe, 1952-1996 , 1999 .

[10]  B. Barkstrom,et al.  Cloud-Radiative Forcing and Climate: Results from the Earth Radiation Budget Experiment , 1989, Science.

[11]  Keith P. Shine,et al.  Simulated sensitivity of the earth's radiation budget to 'changes in cloud properties , 1995 .

[12]  Christian Jakob,et al.  Cloud Cover in the ECMWF Reanalysis , 1999 .

[13]  Jun-Hong Wang,et al.  Determination of cloud vertical structure from upper air observations and its effects on atmospheric circulation in a GCM , 1995 .

[14]  J. Houghton,et al.  Climate change 1995: the science of climate change. , 1996 .

[15]  James J. Hack,et al.  The simulated Earth radiation budget of the National Center for Atmospheric Research community climate model CCM2 and comparisons with the Earth Radiation Budget Experiment (ERBE) , 1994 .

[16]  J. Kiehl,et al.  The simulated Earth radiation budget of the NCAR CCM2 and comparisons with the Earth Radiation Budget Experiment (ERBE) , 1994 .

[17]  Climatic variability of cloud radiative forcing , 1997 .

[18]  Bruce A. Wielicki,et al.  On the determination of cloud cover from satellite sensors: The effect of sensor spatial resolution , 1992 .

[19]  Bryan C. Weare.  Effects of cloud overlap on radiative feedbacks , 2001 .