TY  - GEN
TI  - Reactive halogen species above salt lakes and
salt pans
Y1  - 2013///
AV  - public
A1  - Holla, Robert
ID  - heidok14636
N2  - Salt lakes can be found on all continents and saline soils cover 2.5% of the land surface
of the earth (FAO, 2012). This thesis investigates the presence of reactive halogen
species (RHS) above salt lakes and saline soils to evaluate their relevance for tropospheric
chemistry of the planetary boundary layer. Ground-based MAX-DOAS and LP-DOAS
measurements were conducted at salt lakes and two other sites with high halogen content.
Prior to this work, RHS were found at three salt lakes with mixing ratios ranging from
several pptv up to more than 100 pptv. On the basis of this work the data base on reactive
halogen release from salt lakes was significantly expanded. Passive DOAS and active
DOAS systems were used to examine the vertical as well as the horizontal distribution of
BrO in the Dead Sea Valley. Vertical profiles of aerosols, BrO and NO2 were measured at
two adjacent sites at the Dead Sea using MAX-DOAS. The first time vertical profiles of
BrO and NO2 at the Dead Sea were determined and interpreted in terms of the special
atmospheric dynamics in the Dead Sea Valley. The resulting ground values of BrO and
NO2 at one measurement site were validated by LP-DOAS and show very good agreement.
The field studies presented in this work showed, that the release of RHS in those regions
is less widespread than previously assumed.
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/14636/
KW  - Tropospheric Chemistry
KW  -  Dead Sea
KW  -  Bromine Explosion
KW  -  Ozone Depletion
KW  -  Reactive Halogen Species
ER  -