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Volatility of Secondary Organic Aerosol from β-Caryophyllene Ozonolysis over a Wide Tropospheric Temperature Range

Gao, Linyu ORCID iD icon 1,2; Buchholz, Angela; Li, Zijun; Song, Junwei ORCID iD icon 1,2; Vallon, Magdalena 3; Jiang, Feng ORCID iD icon 2,3; Möhler, Ottmar 1; Leisner, Thomas ORCID iD icon 1; Saathoff, Harald ORCID iD icon 1
1 Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF), Karlsruher Institut für Technologie (KIT)
2 Institut für Geographie und Geoökologie (IFGG), Karlsruher Institut für Technologie (KIT)
3 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract:

We investigated secondary organic aerosol (SOA) from β-caryophyllene oxidation generated over a wide tropospheric temperature range (213–313 K) from ozonolysis. Positive matrix factorization (PMF) was used to deconvolute the desorption data (thermograms) of SOA products detected by a chemical ionization mass spectrometer (FIGAERO-CIMS). A nonmonotonic dependence of particle volatility (saturation concentration at 298 K, C298K*) on formation temperature (213–313 K) was observed, primarily due to temperature-dependent formation pathways of β-caryophyllene oxidation products. The PMF analysis grouped detected ions into 11 compound groups (factors) with characteristic volatility. These compound groups act as indicators for the underlying SOA formation mechanisms. Their different temperature responses revealed that the relevant chemical pathways (e.g., autoxidation, oligomer formation, and isomer formation) had distinct optimal temperatures between 213 and 313 K, significantly beyond the effect of temperature-dependent partitioning. Furthermore, PMF-resolved volatility groups were compared with volatility basis set (VBS) distributions based on different vapor pressure estimation methods. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000160241
Veröffentlicht am 07.07.2023
Originalveröffentlichung
DOI: 10.1021/acs.est.3c01151
Scopus
Zitationen: 7
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Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Geographie und Geoökologie (IFGG)
Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 20.06.2023
Sprache Englisch
Identifikator ISSN: 0013-936X, 1520-5851
KITopen-ID: 1000160241
HGF-Programm 12.11.12 (POF IV, LK 01) Atmospheric chemistry processes
Erschienen in Environmental Science & Technology
Verlag American Chemical Society (ACS)
Band 57
Heft 24
Seiten 8965–8974
Vorab online veröffentlicht am 07.06.2023
Schlagwörter volatility; secondary organic aerosol (SOA); positive matrix factorization (PMF); β-caryophyllene; temperature dependence
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