Combinaison de mesures actives et passives pour l'étude des nuages dans le cadre de la préparation à la mission EarthCARE

Marie Ceccaldi 1
1 SPACE - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : Clouds play a major role in Earth radiation budget and balance. The characterization of clouds in weather and climate models needs better understanding of cloud processes and more information on cloud microphysical properties. Such information can be obtained from active sensors like radar and lidar onboard CloudSat and CALIPSO satellites which are part of the A-Train constellation. The purpose of this thesis is first to improve and study the DARDAR method which provides cloud microphysical properties from variational scheme. Secondly this thesis deals with the adaptation of the method to the EarthCARE mission, which will, in 2016, board a lidar with high spectral resolution capabilities and a Doppler radar. The method for hydrometeors classification, DARDAR-MASK, was improved and adapted to the EarthCARE instruments by means of airborne RALI campaigns. Cloud properties retrieval method, DARDAR-CLOUD, was modified too. Variability of DARDAR-CLOUD retrieval to different microphysical models used was studied as well and radiometric measurements assimilation in the variational scheme.
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  • HAL Id : tel-01119939, version 1

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Marie Ceccaldi. Combinaison de mesures actives et passives pour l'étude des nuages dans le cadre de la préparation à la mission EarthCARE. Climatologie. Université de Versailles Saint-Quentin-en-Yvelines, 2014. Français. ⟨NNT : 2014VERS0017⟩. ⟨tel-01119939⟩

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