 |
| Titel |
Quantitative infrared absorption cross sections of isoprene for atmospheric measurements |
| VerfasserIn |
C. S. Brauer, T. A. Blake, A. B. Guenther, S. W. Sharpe, R. L. Sams, T. J. Johnson |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 11 ; Nr. 7, no. 11 (2014-11-19), S.3839-3847 |
| Datensatznummer |
250115955
|
| Publikation (Nr.) |
 copernicus.org/amt-7-3839-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| Isoprene (C5H8, 2-methyl-1,3-butadiene) is a volatile organic compound
(VOC) and is one of the primary contributors to annual global VOC emissions.
Isoprene is produced primarily by vegetation as well as anthropogenic
sources, and its OH- and O3-initiated oxidations are a major source of
atmospheric oxygenated organics. Few quantitative infrared studies have been
reported for isoprene, limiting the ability to quantify isoprene emissions
via remote or in situ infrared detection. We thus report absorption
cross sections and integrated band intensities for isoprene in the
600–6500 cm−1 region. The pressure-broadened (1 atmosphere N2)
spectra were recorded at 278, 298, and 323 K in a 19.94 cm path-length cell
at 0.112 cm−1 resolution, using a Bruker IFS 66v/S Fourier transform infrared (FTIR) spectrometer.
Composite spectra are derived from a minimum of seven isoprene sample
pressures, each at one of three temperatures, and the number densities are
normalized to 296 K and 1 atm. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|