This is a model used in the past

The Stratospheric Model is the MAECHAM 5 model that extends from the surface to the mesopause (about 80 Km, 0.01 hPa).
It shares the same model structure and the physical parameterizations of the ECHAM 5 model and in addition it includes the parameterization of the effects of a broad band spectrum of non-orographic gravity waves.