This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1007/s10874-007-9065-y in citations.
OH-initiated degradation of several hydrocarbons in the atmosphere simulation chamber SAPHIR
OH-initiated degradation of several hydrocarbons in the atmosphere simulation chamber SAPHIR
Degradation of isoprene, m-xylene, n-octane, propene, and methacrolein by hydroxyl radicals has been studied in the simulation chamber SAPHIR under burden of trace gases as they are typical for the moderately polluted planetary boundary layer. Measured time series of the hydrocarbon mixing ratios an...
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Personal Name(s): | Poppe, D. |
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Brauers, T. / Dorn, H.-P. / Karl, M. / Mentel, T. / Schlosser, E. / Tillmann, R. / Wegener, R. / Wahner, A. | |
Contributing Institute: |
Troposphäre; ICG-2 Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of atmospheric chemistry, 57 (2007) S. 203 - 214 |
Imprint: |
Dordrecht [u.a.]
Springer Science + Business Media B.V
2007
|
Physical Description: |
203 - 214 |
DOI: |
10.1007/s10874-007-9065-y |
Document Type: |
Journal Article |
Research Program: |
Atmosphäre und Klima |
Series Title: |
Journal of Atmospheric Chemistry
57 |
Subject (ZB): | |
Publikationsportal JuSER |
Degradation of isoprene, m-xylene, n-octane, propene, and methacrolein by hydroxyl radicals has been studied in the simulation chamber SAPHIR under burden of trace gases as they are typical for the moderately polluted planetary boundary layer. Measured time series of the hydrocarbon mixing ratios and the OH concentrations were used to determine the rate constants. The hydrocarbons were measured with gas chromatography and proton transfer reaction mass spectrometry. OH was measured with the Julich DOAS (differential optical absorption spectroscopy) instrument. In all cases except methacrolein good agreement was found with the reference rate constants taken from theMaster Chemical Mechanism ( MCM3.1). The data for methacrolein are consistent with the results of Karl et al. ( J. Atmos. Chem 55, 2006, doi:10.1007/s10874-006-9034-x) who reported a 12% smaller value. The degradation of hydrocarbons provides an independent method to analyse precision and accuracy of the OH measurements. A precision of better than 4% over a period of nearly 4 months was found. The accuracy is within the limitations given by the light absorption cross section of OH. Both results are consistent with earlier results by Hausmann et al. |