Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3315804w&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 15, CiteID L15804
Physics
11
Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques, Global Change: Atmosphere (0315, 0325), Global Change: Earth System Modeling (1225), Global Change: Regional Climate Change
Scientific paper
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.
Dessler Andrew E.
Wang Likun
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