Articles | Volume 24, issue 8
https://doi.org/10.5194/acp-24-4789-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-4789-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Apr 2024
Research article |
| 22 Apr 2024
| 22 Apr 2024
Impact of HO2∕RO2 ratio on highly oxygenated α-pinene photooxidation products and secondary organic aerosol formation potential
Yarê Baker
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Sungah Kang
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Rongrong Wu
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Jian Xu
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Annika Zanders
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Quanfu He
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Thorsten Hohaus
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Till Ziehm
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Veronica Geretti
Atmospheric Science, Department of Chemistry and Molecular Biology, University of Gothenburg, 41296 Gothenburg, Sweden
Thomas J. Bannan
Department for Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK
Simon P. O'Meara
Department for Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK
National Centre for Atmospheric Science, University of Manchester, Manchester M13 9PL, UK
Aristeidis Voliotis
Department for Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK
Mattias Hallquist
Atmospheric Science, Department of Chemistry and Molecular Biology, University of Gothenburg, 41296 Gothenburg, Sweden
Gordon McFiggans
Department for Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK
Sören R. Zorn
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Andreas Wahner
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
Institute for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, 52425 Jülich, Germany
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Cited
18 citations as recorded by crossref.
- A mechanistic understanding of the varying yields of highly oxygenated organic molecules L. Yang et al. https://doi.org/10.1038/s41467-025-67007-w
- Elucidation of the myrcene ozonolysis mechanism from a Criegee Chemistry perspective M. Chen et al. https://doi.org/10.5194/acp-26-2103-2026
- The MESSy DWARF (based on MESSy v2.55.2) A. Kerkweg et al. https://doi.org/10.5194/gmd-18-1265-2025
- Atmospheric Simulation Chambers in the ACTRIS Research Infrastructure H. Fuchs et al. https://doi.org/10.5194/amt-19-4165-2026
- Changes in Secondary Organic Aerosol Composition and Volatility Going from a Low to a High HO2/RO2 Regime in α-Pinene Photooxidation V. Geretti et al. https://doi.org/10.1021/acsestair.5c00254
- The impact of CO on secondary organic aerosols formed from the mixture of α-pinene and n-dodecane G. Xie et al. https://doi.org/10.5194/acp-26-9679-2026
- Sulfuric acid, base, and low-volatility organics contribute to aerosol nucleation in urban Houston L. Tiszenkel et al. https://doi.org/10.1038/s43247-025-02310-4
- Atmospheric Chemistry of Hydroxypinonaldehydes: Their Reactions with Hydroperoxy Radicals in the Atmosphere G. Zhao et al. https://doi.org/10.1021/acs.jpca.5c01933
- Treatment of Key Aerosol and Cloud Processes in Earth System Models – Recommendations from the FORCeS Project I. Riipinen et al. https://doi.org/10.16993/tellusb.1883
- A modeling study of global distribution and formation pathways of highly oxygenated organic molecules (HOMs) from monoterpenes X. Shao et al. https://doi.org/10.5194/acp-26-6427-2026
- Ozonolysis of Z-3-Hexenal and T-2-Hexenal: Insights into the Effect of the Double-Bond Position on the SOA Formation from GLV Isomers H. Sun et al. https://doi.org/10.1021/acs.est.5c11509
- Uncertainties and Gaps in Comprehensive Kinetic Modeling of Secondary Organic Aerosol Formation from α-Pinene Ozonolysis C. Shen et al. https://doi.org/10.1021/acsestair.5c00360
- Decomposition of Clusters of Oxygenated Compounds with NO3– by Applying Voltage Scanning to Chemical Ionization Mass Spectrometry in Steady-State Experiments H. Wang et al. https://doi.org/10.1021/acs.estlett.4c00276
- A new approach to detection of highly oxidized products from ethylbenzene oxidation using matrix assisted ionization in vacuum-mass spectrometry L. Wingen et al. https://doi.org/10.1039/D6EA00043F
- Surface-sensitive spectrometry: new insights into radical reactions at interfaces Z. Schiffman et al. https://doi.org/10.1039/D6EM00197A
- Chemical Evolution of Monoterpene-Derived Secondary Organic Aerosols during Dark Aging F. Sari Doré et al. https://doi.org/10.1021/acsestair.5c00196
- Analytical optical methods for measuring organic peroxides and hydroperoxides: An evaluation D. Alba-Elena et al. https://doi.org/10.1016/j.atmosenv.2024.120858
- Photochemical Aging of China VI Gasoline Vehicle Exhaust Drives Nonlinear Secondary Aerosol Formation J. Li et al. https://doi.org/10.1021/acs.est.6c00964
18 citations as recorded by crossref.
- A mechanistic understanding of the varying yields of highly oxygenated organic molecules L. Yang et al. https://doi.org/10.1038/s41467-025-67007-w
- Elucidation of the myrcene ozonolysis mechanism from a Criegee Chemistry perspective M. Chen et al. https://doi.org/10.5194/acp-26-2103-2026
- The MESSy DWARF (based on MESSy v2.55.2) A. Kerkweg et al. https://doi.org/10.5194/gmd-18-1265-2025
- Atmospheric Simulation Chambers in the ACTRIS Research Infrastructure H. Fuchs et al. https://doi.org/10.5194/amt-19-4165-2026
- Changes in Secondary Organic Aerosol Composition and Volatility Going from a Low to a High HO2/RO2 Regime in α-Pinene Photooxidation V. Geretti et al. https://doi.org/10.1021/acsestair.5c00254
- The impact of CO on secondary organic aerosols formed from the mixture of α-pinene and n-dodecane G. Xie et al. https://doi.org/10.5194/acp-26-9679-2026
- Sulfuric acid, base, and low-volatility organics contribute to aerosol nucleation in urban Houston L. Tiszenkel et al. https://doi.org/10.1038/s43247-025-02310-4
- Atmospheric Chemistry of Hydroxypinonaldehydes: Their Reactions with Hydroperoxy Radicals in the Atmosphere G. Zhao et al. https://doi.org/10.1021/acs.jpca.5c01933
- Treatment of Key Aerosol and Cloud Processes in Earth System Models – Recommendations from the FORCeS Project I. Riipinen et al. https://doi.org/10.16993/tellusb.1883
- A modeling study of global distribution and formation pathways of highly oxygenated organic molecules (HOMs) from monoterpenes X. Shao et al. https://doi.org/10.5194/acp-26-6427-2026
- Ozonolysis of Z-3-Hexenal and T-2-Hexenal: Insights into the Effect of the Double-Bond Position on the SOA Formation from GLV Isomers H. Sun et al. https://doi.org/10.1021/acs.est.5c11509
- Uncertainties and Gaps in Comprehensive Kinetic Modeling of Secondary Organic Aerosol Formation from α-Pinene Ozonolysis C. Shen et al. https://doi.org/10.1021/acsestair.5c00360
- Decomposition of Clusters of Oxygenated Compounds with NO3– by Applying Voltage Scanning to Chemical Ionization Mass Spectrometry in Steady-State Experiments H. Wang et al. https://doi.org/10.1021/acs.estlett.4c00276
- A new approach to detection of highly oxidized products from ethylbenzene oxidation using matrix assisted ionization in vacuum-mass spectrometry L. Wingen et al. https://doi.org/10.1039/D6EA00043F
- Surface-sensitive spectrometry: new insights into radical reactions at interfaces Z. Schiffman et al. https://doi.org/10.1039/D6EM00197A
- Chemical Evolution of Monoterpene-Derived Secondary Organic Aerosols during Dark Aging F. Sari Doré et al. https://doi.org/10.1021/acsestair.5c00196
- Analytical optical methods for measuring organic peroxides and hydroperoxides: An evaluation D. Alba-Elena et al. https://doi.org/10.1016/j.atmosenv.2024.120858
- Photochemical Aging of China VI Gasoline Vehicle Exhaust Drives Nonlinear Secondary Aerosol Formation J. Li et al. https://doi.org/10.1021/acs.est.6c00964
Saved (final revised paper)
Latest update: 03 Aug 2026
Short summary
Highly oxygenated organic molecules are important contributors to secondary organic aerosol. Their yield depends on detailed atmospheric chemical composition. One important parameter is the ratio of hydroperoxy radicals to organic peroxy radicals (HO2/RO2), and we show that higher HO2/RO2 ratios lower the secondary organic aerosol yield. This is of importance as laboratory studies are often biased towards organic peroxy radicals.
Highly oxygenated organic molecules are important contributors to secondary organic aerosol....
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