Assessment of MISR and MODIS cloud top heights through inter-comparison with a back-scattering lidar at SIRTA

One year of back‐scattering lidar cloud boundaries and optical depth were analysed for coincident inter‐comparison with the latest processed versions of the NASA‐TERRA MISR stereo and MODIS CO2‐slicing operational cloud top heights. Optically thin clouds were found to be accurately characterised by...

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Bibliographic Details
Published in:Geophysical research letters 2004-02, Vol.31 (4), p.L04114.1-n/a
Main Authors: Naud, Catherine, Muller, Jan-Peter, Haeffelin, Martial, Morille, Yohann, Delaval, Arnaud
Format: Article
Language:English
Subjects:
Earth, ocean, space
Exact sciences and technology
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Summary:One year of back‐scattering lidar cloud boundaries and optical depth were analysed for coincident inter‐comparison with the latest processed versions of the NASA‐TERRA MISR stereo and MODIS CO2‐slicing operational cloud top heights. Optically thin clouds were found to be accurately characterised by the MISR cloud top height product as long as no other cloud was present at lower altitude. MODIS cloud top heights were generally found within the cloud extent retrieved by lidar; agreement improved as cloud optical depth increased and when CO2‐slicing was the only technique used for the retrieval. The difference between Lidar and MISR cloud top heights was found to lie between −0.1 and 0.4 km for low clouds and between 0.1 and 3.1 km for high clouds. The difference between Lidar and MODIS cloud top heights was found to lie between −1.2 and 1.5 km for low clouds and between −1.4 and 2.7 km for high clouds.
ISSN:0094-8276
1944-8007
DOI:10.1029/2003GL018976