A5039079445- Precipitation Measurement and Analysis
- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Climate variability and models
- Hydrology and Watershed Management Studies
Université de Toulouse
2021-2023
Météo-France
2018-2023
Centre National de la Recherche Scientifique
2018-2023
The Megha‐Tropiques satellite was launched in 2011 with a microwave sounder called SAPHIR onboard. This instrument probes the atmosphere six channels around 183.31 GHz water vapour absorption band. Its observations are sensitive to as well hydrometeors. proven be useful for data assimilation by different numerical weather prediction centres, particular clear‐sky assimilation. At Météo‐France, have been routinely assimilated clear sky since 2015 ARPEGE global model. present article introduces...
The assimilation of cloudy and rainy microwave observations is under investigation at Météo-France with a method called "1D-Bay+3D/4D-Var". This comprises two steps: (i) Bayesian inversion (ii) the retrieved relative humidity profiles in 3D/4D-Var framework. In this paper, estimators for are used: either weighted average (WA) or maximum likelihood (ML) kernel density function. Sensitivity studies over first step conducted different degrees freedom: observation error, channel selection...
Abstract Numerical weather prediction centers increasingly make use of cloudy and rainy microwave radiances. Currently, the high frequencies are simulated using simplified assumptions regarding radiative properties frozen hydrometeors. In particular, one single particle shape is often used for all precipitating particles, over globe, cloud types. this paper, a multi‐SSP (single scattering properties) approach 1D Bayesian inversions examined. Two experiments were set up: (1) with three SSPs...