Impact of temperature on the role of Criegee intermediates and peroxy radicals in dimer formation from <italic>β</italic>-pinene ozonolysis

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Abstract 2) are critical in atmospheric oxidation processes and secondary organic aerosol (SOA) formation. However, the influence of temperature on their corresponding reaction mechanisms in SOA formation is unclear. Through utilizing formic acid as a SCI scavenger and regulating the ratio of hydroperoxyl radials (HO2) to RO2 ([HO2 ]/[ RO 2 ∼ ∼ 2 and SCIs in SOA formation were investigated from 248 to 298 K, particularly for dimer formation in β 2 ]/[ RO 2 2 ]/[ RO 2 2 ]/[ RO 2 2 ]/[ RO 2 2 ]/[ RO 2 9 –SCI reactions with RO2. The dimers formed from C9 –SCI reactions with RO2 were estimated to decrease by 61 % at high [HO2 ]/[ RO 2 2 ]/[ RO 2 β -pinene-derived SCIs at lower temperatures observed in this study suggest that monoterpene-derived SCI reactions should be accounted for in describing colder regions of the atmosphere.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Impact of temperature on the role of Criegee intermediates and peroxy radicals in dimer formation from β-pinene ozonolysis ; volume:24 ; number:1 ; year:2024 ; pages:167-184 ; extent:18
Atmospheric chemistry and physics ; 24, Heft 1 (2024), 167-184 (gesamt 18)

Urheber
Gong, Yiwei
Jiang, Feng
Li, Yanxia
Leisner, Thomas
Saathoff, Harald

DOI
10.5194/acp-24-167-2024
URN
urn:nbn:de:101:1-2024011103243526540657
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:22 MESZ

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