Evaluation of the Spatio-Temporal Variability of Tropical Convection in GCMs by Using Geostationary Satellite Data

摘要: The temporal variability of convection at short time-scales (from diurnal to intra-seasonal) is an important characteristic outlining the response tropical atmosphere astronomical forcing and its interaction with dynamical forcing. spatial organisation convective cells into larger clusters different sizes also a strong convection. This paper presents analyses that can be used evaluate spatio-temporal in GCMs from measurements geostationary meteorological satellites. aim not only description activity but trace source cloud radiative obtained GCMs. These make use modelled radiance infrared window are compared satellite data “model-to-satellite”approach. As illustration, we present some preliminary results comparison between ECMWF model Meteosat over Africa Atlantic Ocean. Three time series based either on “first guess” or two runs without assimilation. validate parameterization realistic (i.e. close analysis) thermodynamical fields. Two three months assimilation, identical except for scheme, analysed.