Reintroducing the analysis of humidity in the stratosphere
Semane, Noureddine ; Bonavita, Massimo
Année de publication
2025
An analysis of humidity in the stratosphere to help determine the initial conditions of weather forecasts was introduced in 1999 but removed again a few months later because of excessively high stratospheric humidity, which resulted in significant systematic forecast errors. We have now developed a new way of analysing humidity in the stratosphere, which improves forecasts. It will be introduced in the second half of this year in Cycle 50r1 of ECMWF's Integrated Forecasting System (IFS). The work described here is part of the Copernicus Atmosphere Monitoring Service (CAMS) EvOlution project (CAMEO) funded by the EU.</p>
Accès à la notice sur le site du portail documentaire de Météo-France