Toward the improvement of short-range forecasts by the analysis of cloud variables from IASI radiances
Martinet, Pauline ; Fourrié, Nadia ; Bouteloup, Yves ; Bazile, Eric ; Rabier, Florence
The use of the Infrared Atmospheric Sounding Interferometer (IASI) to improve short-range forecasts by the analysis of cloud variables is presented. After the retrieval of cloud microphysical variables, a one-dimensional (1D) version of the French convective scale model AROME is used here to discuss the persistence of the cloudy increment in the numerical weather prediction (NWP) model. The analysis of cloud variables is shown to significantly improve the forecasts of cloud variables, temperature and humidity during 3 h. This maintenance of the cloud information in the NWP model is expected to have a high impact on the forecasts of clouds and heavy rainfall events.
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