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@ARTICLE{Fuchs:826196,
author = {Fuchs, Hendrik and Tan, Zhaofeng and Lu, Keding and Bohn,
Birger and Broch, Sebastian and Brown, Steven S. and Dong,
Huabin and Gomm, Sebastian and Häseler, Rolf and He,
Lingyan and Hofzumahaus, Andreas and Holland, Frank and Li,
Xin and Liu, Ying and Lu, Sihua and Min, Kyung-Eun and
Rohrer, Franz and Shao, Min and Wang, Baolin and Wang,
Mingjin and Wu, Yusheng and Zeng, Limin and Zhang, Yinsong
and Wahner, Andreas and Zhang, Yuanhang},
title = {{OH} reactivity at a rural site ({W}angdu) in the {N}orth
{C}hina {P}lain: contributions from {OH} reactants and
experimental {OH} budget},
journal = {Atmospheric chemistry and physics},
volume = {17},
number = {1},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2017-00442},
pages = {645 - 661},
year = {2017},
abstract = {In 2014, a large, comprehensive field campaign was
conducted in the densely populated North China Plain. The
measurement site was located in a botanic garden close to
the small town Wangdu, without major industry but influenced
by regional transportation of air pollution. The loss rate
coefficient of atmospheric hydroxyl radicals (OH) was
quantified by direct measurements of the OH reactivity.
Values ranged between 10 and 20 s−1 for most of the
daytime. Highest values were reached in the late night with
maximum values of around 40 s−1. OH reactants mainly
originated from anthropogenic activities as indicated (1) by
a good correlation between measured OH reactivity and carbon
monoxide (linear correlation coefficient R2 = 0.33) and
(2) by a high contribution of nitrogen oxide species to the
OH reactivity (up to $30 \%$ in the morning). Total OH
reactivity was measured by a laser flash
photolysis–laser-induced fluorescence instrument (LP-LIF).
Measured values can be explained well by measured trace gas
concentrations including organic compounds, oxygenated
organic compounds, CO and nitrogen oxides. Significant,
unexplained OH reactivity was only observed during nights,
when biomass burning of agricultural waste occurred on
surrounding fields. OH reactivity measurements also allow
investigating the chemical OH budget. During this campaign,
the OH destruction rate calculated from measured OH
reactivity and measured OH concentration was balanced by the
sum of OH production from ozone and nitrous acid photolysis
and OH regeneration from hydroperoxy radicals within the
uncertainty of measurements. However, a tendency for higher
OH destruction compared to OH production at lower
concentrations of nitric oxide is also observed, consistent
with previous findings in field campaigns in China.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000393892700002},
doi = {10.5194/acp-17-645-2017},
url = {https://juser.fz-juelich.de/record/826196},
}