%0 Generic
%A Schmitt, Stefan
%C Heidelberg, Germany
%D 2016
%F heidok:20245
%R 10.11588/heidok.00020245
%T The Dynamics of Reactive Halogen Species at the Dead Sea Valley
%U https://archiv.ub.uni-heidelberg.de/volltextserver/20245/
%X Reactive halogen species (RHS) have a significant impact on the chemical composition of the atmosphere. With its high halite abundance and unique topography the Dead Sea Valley (DSV) is predestined for the investigation of RHS. In the  frame work of this thesis, two extensive measurement campaigns were carried out at the DSV in May 2012 and November 2014. The comparison of MAX-DOAS and LP-DOAS data with meteorological measurements indicates strong impact  of transport process on the observed trace gas dynamics. The strong depletion of NO2 mixing ratios during daytime coincides with increased RHS abundance and suggests the formation of halogenated nitrate compounds. These are assumed to enhance the release of RHS from aerosol surfaces by heterogeneous processes. Elevated, confined layers of BrO of up to 50 pptv suggest the release of reactive  bromine compounds from aerosol surfaces. The correlation of IO with surface waves indicates abiotic iodine release as a result of increased gas exchange at the water surface. For the first time, gaseous molecular iodine (up to 70 pptv)  was detected at the DSV serving as a precursor for reactive iodine. Further, first direct evidence for reactive chlorine chemistry at the DSV was found by the  detection of OClO at mixing ratios of up to 6 pptv.