Drivers of biogenic secondary organic aerosol  from the past to the future

Shi, Yang; Heald, Colette L.; Kroll, Jesse H.

doi:10.5194/acp-26-15853-2026

Articles | Volume 26, issue 21

https://doi.org/10.5194/acp-26-15853-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-15853-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 21

Research article

|

11 Nov 2026

Research article |

| 11 Nov 2026

Drivers of biogenic secondary organic aerosol from the past to the future

Yang Shi, Colette L. Heald, and Jesse H. Kroll

Supplement

https://doi.org/10.5194/acp-26-15853-2026-supplement

Data sets

Drivers of biogenic secondary organic aerosol from the past to the future Yang Shi et al. https://doi.org/10.5281/zenodo.21877569

Community Earth System Model Version 2.2.2 NCAR https://github.com/ESCOMP/CESM/releases/tag/release-cesm2.2.2

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Short summary

We implement secondary organic aerosol (SOA) formation pathways due to peroxy radical (RO₂) isomerization and accretion reactions in the CESM2 model. The contribution of RO₂ pathways to SOA formation varies from the past to the future; for monoterpenes RO₂, isomerization remains important under all climate conditions. We also quantify changes in total biogenic SOA burden under different climates. Our study highlights the need to better represent RO₂ chemistry in SOA modeling.