The IUGG/EGU/WCRP-SPARC training school on stratosphere-troposphere interactions is jointly organised by SPARC (Stratosphere-troposphere Processes And their Role in Climate, a core project of the World Climate Research Programme), the Climate Systems Analysis Group at the University of Cape Town, and the International Commission on the Middle Atmosphere. The training school will take place from 2-5 September at the University of Cape Town.