The seminar brings together students in the field of atmosphere and climate. Based on classic and current scientific articles, presentation techniques (presentations, poster presentations) are practised and students get a first insight into research in the field of atmosphere and climate.

The lecture gives an overview on the manifold reactions which occur in the gas phase, in stratospheric aerosol droplets and in polar cloud particles. The focus is on the chemistry of stratospheric ozone and its influence through natural and anthropogenic effects, especially the ozone depletion caused by FCKW in mid-latitude and polar regions as well as the coupling with the greenhouse effect.