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@ARTICLE{Washenfelder:3832,
author = {Washenfelder, R.A. and Langford, A.O. and Fuchs, H. and
Brown, S.S.},
title = {{M}easurement of glyoxal using an incoherent broadband
cavity enhanced absorption spectrometer},
journal = {Atmospheric chemistry and physics},
volume = {8},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {PreJuSER-3832},
pages = {7779 - 7793},
year = {2008},
note = {We thank Karl Feierabend for his assistance in synthesizing
glyoxal. We thank Rich McLaughlin for machining custom
mirror mounts for the IBBCEAS instrument. We thank Susan
Solomon for the loan of the InSpectrum 150. We thank Rainer
Volkamer and Bill Dube for useful discussions. RAW
acknowledges support from the National Research Council
Research Associateship Program. This work was funded in part
by NOAA's Health of the Atmosphere and Atmospheric Chemistry
and Climate programs.},
abstract = {We describe an instrument for simultaneous measurements of
glyoxal (CHOCHO) and nitrogen dioxide (NO2) using cavity
enhanced absorption spectroscopy with a broadband light
source. The output of a Xenon arc lamp is coupled into a 1m
optical cavity, and the spectrum of light exiting the cavity
is recorded by a grating spectrometer with a charge-coupled
device (CCD) array detector. The mirror reflectivity and
effective path lengths are determined from the known
Rayleigh scattering of He and dry zero air (N-2+O-2).
Least-squares fitting, using published reference spectra,
allow the simultaneous retrieval of CHOCHO, NO2, O-4, and
H2O in the 441 to 469 nm spectral range. For a 1-min
sampling time, the precision (+/- 1 sigma) on signal for
measurements of CHOCHO and NO2 is 29 pptv and 20 pptv,
respectively. We directly compare measurements made with the
incoherent broadband cavity enhanced absorption spectrometer
with those from cavity ringdown instruments detecting CHOCHO
and NO2 at 404 and 532 nm, respectively, and find linear
agreement over a wide range of concentrations. The
instrument has been tested in the laboratory with both
synthetic and real air samples, and the demonstrated
sensitivity and specificity suggest a strong potential for
field measurements of both CHOCHO and NO2.},
keywords = {J (WoSType)},
cin = {ICG-2},
ddc = {550},
cid = {I:(DE-Juel1)VDB791},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000262411800033},
url = {https://juser.fz-juelich.de/record/3832},
}