Instantaneous cloud overlap statistics in the tropical area revealed by ICESat/GLAS data
Article first published online: 4 AUG 2006
Copyright 2006 by the American Geophysical Union.
Geophysical Research Letters
Volume 33, Issue 15, August 2006
How to Cite
2006), Instantaneous cloud overlap statistics in the tropical area revealed by ICESat/GLAS data, Geophys. Res. Lett., 33, L15804, doi:10.1029/2005GL024350., and (
- Issue published online: 4 AUG 2006
- Article first published online: 4 AUG 2006
- Manuscript Accepted: 27 JUN 2006
- Manuscript Revised: 18 APR 2006
- Manuscript Received: 10 AUG 2005
 This study uses ICESat/GLAS instantaneous observations from 29 September to 18 November 2003 to investigate cloud overlap statistics between 10°S–20°N. The results show that 75.1% of profiles detect clouds: 46.5% are single layer and 28.6% multilayer clouds (cloud layers are separated by 0.5km). Using a definition of cloud type based on cloud heights and laser attenuation information, cloud overlap statistics are derived by analyzing 96.4% of the cloudy profiles. The most frequent overlap occurs between cirrus clouds and boundary layer clouds, which accounts for 31.88% of boundary clouds. 23.8% of deep convection has overlying cirrus clouds. We find that differences exist between the cloud overlap fraction from the GLAS observations and one calculated from the random overlap assumption commonly used by climate models.