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@ARTICLE{Rohrer:52283,
author = {Rohrer, F. and Berresheim, H.},
title = {{S}trong correlation between levels of tropospheric
hydroxyl radicals and solar ultraviolet radiation},
journal = {Nature},
volume = {442},
issn = {0028-0836},
address = {London [u.a.]},
publisher = {Nature Publising Group},
reportid = {PreJuSER-52283},
pages = {184 - 187},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {The most important chemical cleaning agent of the
atmosphere is the hydroxyl radical, OH. It determines the
oxidizing power of the atmosphere, and thereby controls the
removal of nearly all gaseous atmospheric pollutants. The
atmospheric supply of OH is limited, however, and could be
overcome by consumption due to increasing pollution and
climate change, with detrimental feedback effects. To date,
the high variability of OH concentrations has prevented the
use of local observations to monitor possible trends in the
concentration of this species. Here we present and analyse
long-term measurements of atmospheric OH concentrations,
which were taken between 1999 and 2003 at the Meteorological
Observatory Hohenpeissenberg in southern Germany. We find
that the concentration of OH can be described by a
surprisingly linear dependence on solar ultraviolet
radiation throughout the measurement period, despite the
fact that OH concentrations are influenced by thousands of
reactants. A detailed numerical model of atmospheric
reactions and measured trace gas concentrations indicates
that the observed correlation results from compensations
between individual processes affecting OH, but that a full
understanding of these interactions may not be possible on
the basis of our current knowledge of atmospheric chemistry.
As a consequence of the stable relationship between OH
concentrations and ultraviolet radiation that we observe, we
infer that there is no long-term trend in the level of OH in
the Hohenpeissenberg data set.},
keywords = {J (WoSType)},
cin = {ICG-II},
ddc = {070},
cid = {I:(DE-Juel1)VDB48},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Multidisciplinary Sciences},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:16838018},
UT = {WOS:000238979700043},
doi = {10.1038/nature04924},
url = {https://juser.fz-juelich.de/record/52283},
}