Research Topics


Naturally produced halogen compounds are the central subject of our research unit. Produced in, and released from soils, salt surfaces, and aerosols, they are of utmost importance for stratospheric and tropospheric chemistry. Examples are

These compounds may pose a hazard to terrestrial ecosystems, which has already been shown for halogenated carbonic acids such as trichloroacetic acid.

The reaction mechanisms prevailing in natural halogenation processes in soil and on aerosols are similar from the viewpoint of reaction products, pointing to a chemistry where free radicals are involved. Radical reactions may be induced by

To address the key open questions, a combined effort of scientists from biogeosciences and atmospheric science is required. Scientific work groups on the following research fields are participating:

Our approach is threefold: