Highly oxygenated molecules (HOMs) and secondary organic aerosol (SOA) formation from the oxidation of α- and β-phellandrenes by NO3 radicals

Harb, Sergio; Cirtog, Manuela; Alage, Stéphanie; Cantrell, Christopher; Cazaunau, Mathieu; Michoud, Vincent; Pangui, Edouard; Bergé, Antonin; Giorio, Chiara; Battaglia, Francesco; Picquet-Varrault, Bénédicte

doi:10.5194/acp-25-11003-2025

Articles | Volume 25, issue 18

https://doi.org/10.5194/acp-25-11003-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Atmospheric Chemistry of the Suburban Forest – multiplatform...

https://doi.org/10.5194/acp-25-11003-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 18

Research article

|

23 Sep 2025

Research article |

| 23 Sep 2025

Highly oxygenated molecules (HOMs) and secondary organic aerosol (SOA) formation from the oxidation of α- and β-phellandrenes by NO₃ radicals

Sergio Harb, Manuela Cirtog, Stéphanie Alage, Christopher Cantrell, Mathieu Cazaunau, Vincent Michoud, Edouard Pangui, Antonin Bergé, Chiara Giorio, Francesco Battaglia, and Bénédicte Picquet-Varrault

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Nov 2024	250	62	12	324
Dec 2024	126	30	4	160
Jan 2025	58	12	4	74
Feb 2025	74	26	8	108
Mar 2025	36	14	0	50
Apr 2025	52	14	82	148
May 2025	44	6	98	148
Jun 2025	78	18	52	148
Jul 2025	70	24	2	96
Aug 2025	394	16	4	414
Sep 2025	2,149	37	12	2,198
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Nov 2025	143	50	9	202
Dec 2025	167	64	8	239
Jan 2026	185	66	15	266
Feb 2026	181	59	13	253
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Apr 2026	150	102	13	265
May 2026	30	18	2	50

Cumulative views and downloads (calculated since 08 Nov 2024)

Month	HTML	PDF	XML	Total
Nov 2024	250	62	12	324
Dec 2024	126	30	4	160
Jan 2025	58	12	4	74
Feb 2025	74	26	8	108
Mar 2025	36	14	0	50
Apr 2025	52	14	82	148
May 2025	44	6	98	148
Jun 2025	78	18	52	148
Jul 2025	70	24	2	96
Aug 2025	394	16	4	414
Sep 2025	2,149	37	12	2,198
Oct 2025	231	34	1	266
Nov 2025	143	50	9	202
Dec 2025	167	64	8	239
Jan 2026	185	66	15	266
Feb 2026	181	59	13	253
Mar 2026	145	113	8	266
Apr 2026	150	102	13	265
May 2026	30	18	2	50

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We investigated the reactions of α- and β-phellandrenes (from vegetation emissions) with NO₃ radicals, a major nighttime oxidant from human activities. Using lab-based simulations, we examined these reactions and measured particle formation and by-products. Our findings reveal that α- and β-phellandrenes are efficient particle sources and enhance our understanding of biogenic–anthropogenic interactions and their contributions to atmospheric changes affecting climate and health.