%0 Generic
%A Smoydzin, Linda
%D 2008
%F heidok:8501
%K Organische Aerosole , Ozonchemie , Halogenchemie , Totes MeerOrganic Aerosols , Ozone Chemistry , Halogen Chemistry , Dead Sea
%R 10.11588/heidok.00008501
%T Modelling Gas Phase and Aerosol Phase Chemistry in the Atmospheric Boundary Layer
%U https://archiv.ub.uni-heidelberg.de/volltextserver/8501/
%X Organic material from the ocean's surface microlayer can be incorporated into sea salt aerosol particles often producing a surface film on the aerosol. Such an organic coating can reduce the mass transfer between the gas phase and the aerosol phase influencing sea salt chemistry in the marine boundary layer. This aspect of atmospheric chemistry is investigated using a numerical one-dimensional model in the first part of this thesis. Estimates for the lifetime of the surface coating are given. Furthermore, it is showed in which way the intensity of the effect of an organic film depends on the concentrations of the organic species as well as the order of magnitude of the the mass transfer reduction. The second part of the thesis deals with the investigation of ozone depletion events and extraordinary high bromine levels along the Dead Sea. The contribution of degassing bromine species out of the Dead Sea water to the total bromine budget is investigated by including this process explicitly in a numerical model. It is showed that only when considering this process it is possible to simulate high mixing ratios for BrO and low mixing ratios for ozone in agreement to field measurements.