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| Titel |
Photo-oxidation of pinonaldehyde at low NOx: from chemistry to organic aerosol formation |
| VerfasserIn |
H. J. Chacon-Madrid, K. M. Henry, N. M. Donahue |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 6 ; Nr. 13, no. 6 (2013-03-18), S.3227-3236 |
| Datensatznummer |
250018529
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| Publikation (Nr.) |
 copernicus.org/acp-13-3227-2013.pdf |
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| Zusammenfassung |
| Pinonaldehyde oxidation by OH radicals under low-NOx conditions
produces significant secondary organic aerosol (SOA) mass yields. Under
concurrent UV illumination, mass yields are lower than high-NOx
yields published earlier by our group. However, when OH radicals are produced via
dark ozonolysis the SOA mass yields are comparable at high and low NOx.
Because pinonaldehyde is a major first-generation gas-phase product of
α-pinene oxidation by either ozone or OH radicals, its potential to
form SOA serves as a molecular counterpoint to bulk SOA aging experiments
involving SOA formed from α-pinene. Both the general tendency for
aging reactions to produce more SOA and the sensitivity of the low-NOx
products to UV photolysis observed in the bulk clearly occur for this single
species as well. Photochemical oxidation of pinonaldehye and analogous
first-generation terpene oxidation products are potentially a significant
source of additional SOA in biogenically influenced air masses. |
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