Journal articles
Validation of POLDER/ADEOS data using a ground-based lidar network: Preliminary results for cirrus clouds
Abstract : POLDER-1 on board the Japanese ADEOS platform has collected 8 months of data (October 1996 to June 1997). POLDER is a visible radiometer with multi-directional and polarization capabilities. These features allow to obtain information both on cloud thermodynamical phase and cloud altitude. The POLDER cloud algorithms are currently under validation. For cirrus clouds, a validation based on a comparison between cloud properties inferred from POLDER-1 data and cloud properties retrieved from a ground-based lidar network is currently under consideration. In this paper, preliminary comparisons between cloud altitude inferred from POLDER-1 and lidars are presented. These comparisons show an under-estimation of cloud altitude by POLDER-1 for optically thin clouds. A first theoretical analysis based on radiative transfer simulations allows to explain the difference between POLDER and lidar altitudes. Moreover, a preliminary comparison between thermodynamical cloud phase (liquid water / ice) obtained with POLDER-1 and cloud temperature inferred from radiosoundings and cloud altitudes shows that cirrus clouds at temperatures lower than −40°C are correctly identified as ice layers by POLDER-1
https://hal-insu.archives-ouvertes.fr/insu-03591805
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Monday, February 28, 2022 - 6:51:35 PM
Last modification on : Wednesday, March 23, 2022 - 3:50:18 PM
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Monday, February 28, 2022 - 6:51:35 PM
Last modification on : Wednesday, March 23, 2022 - 3:50:18 PM
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