Influence of relative humidity on the heterogeneous oxidation of secondary organic aerosol

Li, Ziyue; Smith, Katherine A.; Cappa, Christopher D.

doi:https://doi.org/10.5194/acp-18-14585-2018

Articles | Volume 18, issue 19

https://doi.org/10.5194/acp-18-14585-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-14585-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 19

Research article

|

11 Oct 2018

Research article |

| 11 Oct 2018

Influence of relative humidity on the heterogeneous oxidation of secondary organic aerosol

Ziyue Li, Katherine A. Smith, and Christopher D. Cappa

Supplement

https://doi.org/10.5194/acp-18-14585-2018-supplement

Data sets

Influence of Relative Humidity on the Heterogeneous Oxidation of Secondary Organic Aerosol Cappa, Christopher; Li, Ziyue; Smith, Katherine https://doi.org/10.25338/B8ZK5X

Model code and software

Influence of Relative Humidity on the Heterogeneous Oxidation of Secondary Organic Aerosol Cappa, Christopher; Li, Ziyue; Smith, Katherine https://doi.org/10.25338/B8ZK5X

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Short summary

We investigated the influence of relative humidity (RH) on the heterogeneous oxidation of secondary organic aerosol (SOA) particles by OH radicals. We observed significantly faster volume loss and compositional change of SOA at high RH, showing that viscosity differences determine compositional changes, but variability in either the uptake coefficient or the fragmentation probability are required to explain the difference in volume loss between low and high RH.