Laboratory experiments on tropospheric multiphase processes
In the Chemistry Department at TROPOS numerous laboratory experiments are available to enhance the understanding of tropospheric multiphase processes. Depending on the issue, processes are investigated which can occur either in the gas phase, at transition from the gas to the aqueous or particle phase as well as in the aqueous and particle phase itself. In the gas phase, preferably the reactivity of OH – one of the most reactive species in the lower troposphere – is determined. Another focus lies on investigations of Criegee intermediate species in der gas phase. To characterize the reactive uptake of certain species to the aqueous phase or onto aerosol particles, a droplet experiment and a Knudsen cell are at disposal. In the aqueous phase laboratory (Laser lab) reaction kinetics determine rate constants of radical reactions as well as interactions with non-radical oxidants (like ozone and hydrogen peroxide). Furthermore, there exist numerous analytical methods for the identification and quantification of reaction products (product studies).