High-resolution absorption cross-section of glyoxal in the UV–vis and IR spectral ranges

Volkamer, Rainer; Spietz, Peter; Burrows, J. P.; Platt, U.

doi:10.1016/j.jphotochem.2004.11.011

Cited by 248 publications

(237 citation statements)

References 37 publications

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“…The 3-hexene-2,5-dione formation yields of Bethel et al 11 from the OH + p-xylene and OH + 1,2,4-trimethylbenzene reactions are identical, within the experimental uncertainties, with the coproduct glyoxal 23, 32 and methylglyoxal 23 formation yields, respectively. As discussed and presented in the Supporting Information, using the same analytical procedures as employed here, the measured formation yields of 1,4-butenedial 13 are similar to those of its assumed coproducts 23,33 from the OH + toluene and OH + o-xylene reactions (Tables S3 and S4 and Figure S12, Supporting Information).…”

mentioning

confidence: 53%

Products of the OH Radical-Initiated Reactions of Furan, 2- and 3-Methylfuran, and 2,3- and 2,5-Dimethylfuran in the Presence of NO

et al. 2013

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Products of the gas-phase reactions of OH radicals with furan, furan-d 4, 2- and 3-methylfuran, and 2,3- and 2,5-dimethylfuran have been investigated in the presence of NO using direct air sampling atmospheric pressure ionization tandem mass spectrometry (API-MS and API-MS/MS), and gas chromatography with flame ionization and mass spectrometric detectors (GC–FID and GC–MS) to analyze samples collected onto annular denuders coated with XAD solid adsorbent and further coated with O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine for derivatization of carbonyl-containing compounds to their oximes. The products observed were unsaturated 1,4-dicarbonyls, unsaturated carbonyl-acids and/or hydroxy-furanones, and from 2,5-dimethylfuran, an unsaturated carbonyl-ester. Quantification of the unsaturated 1,4-dicarbonyls was carried out by GC–FID using 2,5-hexanedione as an internal standard, and the measured molar formation yields were: HC(O)CHCHCHO (dominantly the E-isomer) from OH + furan, 75 ± 5%; CH3C(O)CHCHCHO (dominantly the E-isomer) from OH + 2-methylfuran, 31 ± 5%; HC(O)C(CH3)CHCHO (a E-/Z-mixture) from OH + 3-methylfuran, 38 ± 2%; and CH3C(O)C(CH3)CHCHO from OH + 2,3-dimethylfuran, 8 ± 2%. In addition, a formation yield of 3-hexene-2,5-dione from OH + 2,5-dimethylfuran of 27% was obtained from a single experiment, in good agreement with a previous value of 24 ± 3% from GC–FID analyses of samples collected onto Tenax solid adsorbent without derivatization.

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mentioning

confidence: 53%

Products of the OH Radical-Initiated Reactions of Furan, 2- and 3-Methylfuran, and 2,3- and 2,5-Dimethylfuran in the Presence of NO

et al. 2013

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“…The uncertainties associated to the glyoxal cross-sections have been estimated to be less than 5% (Volkamer et al, 2005a). In addition, the uncertainties in the other cross-section data sets included in the DOAS fit also contribute to the systematic errors via their cross-correlations with the glyoxal spectrum.…”

Section: Conversion Into Vertical Column Densitiesmentioning

confidence: 96%

“…Intense interferences between the glyoxal and Ring spectral features below 430 nm prevent the extension of the window towards the ultraviolet (Vrekoussis et al, 2009). The reference glyoxal absorption cross-sections used in the retrievals have been measured by Volkamer et al (2005a) at high resolution. In this spectral region, the absorption of light by ozone, NO 2 , water vapour and the O 2 -O 2 collision pair is significant and is considered by including their respective reference absorption crosssection in the DOAS retrievals.…”

Section: Retrieval Settingsmentioning

confidence: 99%

Glyoxal vertical columns from GOME-2 backscattered light measurements and comparisons with a global model

et al. 2010

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Abstract. Glyoxal vertical column densities have been retrieved from nadir backscattered radiances measured from 2007 to 2009 by the spaceborne GOME-2/METOP-A sensor. The retrieval algorithm is based on the DOAS technique and optimized settings have been used to determine glyoxal slant columns. The liquid water absorption is accounted for using a two-step DOAS approach, leading to a drastic improvement of the fit quality over remote clear water oceans. Air mass factors are calculated by means of look-up tables of weighting functions pre-calculated with the LIDORT v3.3 radiative transfer model and using a priori glyoxal vertical distributions provided by the IMAGESv2 chemical transport model. The total error estimate comprises random and systematic errors associated to the DOAS fit, the air mass factor calculation and the cloud correction. The highest glyoxal vertical column densities are mainly observed in continental tropical regions, while the mid-latitude columns strongly depend on the season with maximum values during warm months. An anthropogenic signature is also observed in highly populated regions of Asia. Comparisons with glyoxal columns simulated with IMAGESv2 in different regions of the world generally point to a missing glyoxal source, most probably of biogenic origin.

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“…The latter are taken from: NO 2 (Voigt et al, 2002), Glyoxal (CHOCHO) (Volkamer et al, 2005), O 3 (Voigt et al, 2001), O 4 (Greenblatt et al, 1990) and H 2 O (Hitran 2006, see Rothman et al, 2003). For the non-linear optimization DOASIS uses a Levenberg-Marquard fit and b-splines for interpolation.…”

Section: Experimental Setup and Retrieval Proceduresmentioning

confidence: 99%

NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

et al. 2012

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Abstract. In this study we present the first long term measurements of atmospheric nitrogen dioxide (NO 2 ) using a LED based Long Path Differential Optical Absorption Spectroscopy (LP-DOAS) instrument. This instrument is measuring continuously in Hong Kong since December 2009, first in a setup with a 550 m absorption path and then with a 3820 m path at about 30 m to 50 m above street level. The instrument is using a high power blue light LED with peak intensity at 450 nm coupled into the telescope using a Y-fibre bundle. The LP-DOAS instrument measures NO 2 levels in the Kowloon Tong and Mongkok district of Hong Kong and we compare the measurement results to mixing ratios reported by monitoring stations operated by the Hong Kong Environmental Protection Department in that area. Hourly averages of coinciding measurements are in reasonable agreement (R = 0.74). Furthermore, we used the long-term data set to validate the Ozone Monitoring Instrument (OMI) NO 2 data product. Monthly averaged LP-DOAS and OMI measurements correlate well (R = 0.84) when comparing the data for the OMI overpass time. We analyzed weekly patterns in both data sets and found that the LP-DOAS detects a clear weekly cycle with a reduction on weekends during rush hour peaks, whereas OMI is not able to observe this weekly cycle due to its fix overpass time (13:30-14:30 LT -local time).

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High-resolution absorption cross-section of glyoxal in the UV–vis and IR spectral ranges

Cited by 248 publications

References 37 publications

Products of the OH Radical-Initiated Reactions of Furan, 2- and 3-Methylfuran, and 2,3- and 2,5-Dimethylfuran in the Presence of NO

Products of the OH Radical-Initiated Reactions of Furan, 2- and 3-Methylfuran, and 2,3- and 2,5-Dimethylfuran in the Presence of NO

Glyoxal vertical columns from GOME-2 backscattered light measurements and comparisons with a global model

NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

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High-resolution absorption cross-section of glyoxal in the UV–vis and IR spectral ranges

Cited by 248 publications

References 37 publications

Products of the OH Radical-Initiated Reactions of Furan, 2- and 3-Methylfuran, and 2,3- and 2,5-Dimethylfuran in the Presence of NO

Products of the OH Radical-Initiated Reactions of Furan, 2- and 3-Methylfuran, and 2,3- and 2,5-Dimethylfuran in the Presence of NO

Glyoxal vertical columns from GOME-2 backscattered light measurements and comparisons with a global model

NO&lt;sub&gt;2&lt;/sub&gt; measurements in Hong Kong using LED based long path differential optical absorption spectroscopy

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NO<sub>2</sub> measurements in Hong Kong using LED based long path differential optical absorption spectroscopy