Experiments covering atmospheric physics, meteorology and atmospheric dynamics, aerosol properties, ice nucleation and trace gas physics will be performed in the laboratory and partly outdoors.

Observation networks - the combination of individual instruments - are the starting point of quantitative environmental studies. The structure and idiosyncrasies of existing observation networks are shown. When working in individual experiments on practical problems, various types of observation networks are dealt with; questions related to data quality and data availability are discussed.