Satellite remote sensing of cloud base height for convective cloud fields: A case study

A method is proposed for estimating base heights of convective clouds from satellite data. The approach takes advantage of the fact that convective water clouds appear as geometrically and optically thin clouds near an approximately constant condensation level in their earliest stage of growth and t...

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Bibliographic Details
Published in:Geophysical research letters 2007-09, Vol.34 (17), p.n/a
Main Authors: Meerkötter, Ralf, Zinner, Tobias
Format: Article
Language:English
Subjects:
cloud base height
Earth sciences
Earth, ocean, space
Exact sciences and technology
NOAA/AVHRR data
remote sensing
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Summary:A method is proposed for estimating base heights of convective clouds from satellite data. The approach takes advantage of the fact that convective water clouds appear as geometrically and optically thin clouds near an approximately constant condensation level in their earliest stage of growth and that deriving geometrical thicknesses for such thin clouds is less error prone. Striking is the fact that the method also provides the base height for clouds with large vertical extensions and high optical thicknesses. The method has been applied to NOAA/AVHRR data of 20 selected cloud scenes. For an evaluation satellite retrieved cloud base heights have been compared to surface ceilometer measurements at the same time. First results are encouraging. The standard deviation of the differences between satellite and ceilometer measurements is ±369m with no systematic bias.
ISSN:0094-8276
1944-8007
DOI:10.1029/2007GL030347