The ICOsahedral Nonhydrostatic model with Aerosols and Reactive Trace gases (ICON-ART) is a state-of- the-art modelling system for the simulation of interactions between atmospheric composition and circulation. It can be used across a wide variety of spatial and temporal scales, e.g. from weather to climate time scales. We present the latest results of simulations in the context of the POLSTRACC campaign. Here, we used the two-way nesting technique with a global domain resolution of 40 km and a nested domain with 20 km. The second part of this talk focusses on decadal integrations using a simple stratospheric chemistry scheme in conjunction with the climate physics configuration of ICON-ART.