Tropospheric Relative Humidity Profile Statistical Retrievals and their Confidence Interval from Megha-Tropiques Measurements

Ramses Sivira 1 Hélène Brogniez 1 Cécile Mallet 1 Yacine Oussar 2
1 SPACE - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : The combination of the two microwave radiometers, SAPHIR and MADRAS, on board the Megha-Tropiques platform is explored to define a retrieval method that estimates not only the relative humidity profile but also the associated confidence intervals. A comparison of three retrievals models was performed, in equal conditions of input and output data sets, through their statistical values (error variance, correlation coefficient and error mean) obtaining a profile of seven layers of relative humidity. The three models show the same behavior with respect to layers, mid-tropospheric layers reaching the best statistical values suggesting a modelindependent problem. Finally, the study of the probability density function of the relative humidity at a given atmospheric pressure further gives insight of the confidence intervals.
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Ramses Sivira, Hélène Brogniez, Cécile Mallet, Yacine Oussar. Tropospheric Relative Humidity Profile Statistical Retrievals and their Confidence Interval from Megha-Tropiques Measurements. 9th International Symposium on Tropospheric Profiling (ISTP), Sep 2012, L'Aquila, Italy. 4 pp. ⟨hal-00736777⟩

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