The chemical characterization of atmospheric particles, their sources, transportand their importance for heterogeneous and aqueous phase chemistry.
Our research intends to understand the tropospheric multiphase system. Model development is based on experimental work in the laboratory and in the field. Lab work utilises state-of-the-art physical and analytical chemistry methods to study gas phase, aqueous phase, organic phase, surface and, alltogether, multiphase phenomena. Field work aims to understand chemical processing and composition of tropospheric particles, clouds, fog and rain in the complex interplay of all compartments involved.
The chemical characterisation of anthropogenic aerosol, chemical multiphase processes and the formation and deposition of atmospheric trace gases are examined.
The physicochemical characterization of gas and particle phase before, during and after clouds, chemical interactions of cloud droplets, gas and particle phase.
Since 1992, Melpitz is a research station for continuously characterized meteorologically and physico-chemically and interdisciplinary field campaigns.
The advancement of the analytic equipment and methods as well as the extension of the substance spectrum.
Heterogeneous, gas-phase and homogeneous aqueous phase processes, particle modifications in an aerosol chamber and the nucleation in a flow tube are realised.
Investigation of nucleation from the reaction OH + SO2 under near-atmospheric conditions, NH3. and organic substances
Secondary organic aerosol via ozonolysis of biogenic hydrocarbons and OH radical initiated reaction of aromatic compounds.
Oxidative degradation reactions of important organic compounds (benzene, butadiene, isoprene, alpha-pinene) aere studied mechanistically.
Investigation of oxidation reactions of functionalized hydrocarbons in aqueous solution and phase transfer.
Based on lab and field experiments chemical mechanisms are formulated and modelled as well as different modules developed for improving higher scale models.