Articles | Volume 22, issue 23
https://doi.org/10.5194/acp-22-15449-2022
https://doi.org/10.5194/acp-22-15449-2022
Research article
 | 
07 Dec 2022
Research article |  | 07 Dec 2022

Observation-based constraints on modeled aerosol surface area: implications for heterogeneous chemistry

Rachel A. Bergin, Monica Harkey, Alicia Hoffman, Richard H. Moore, Bruce Anderson, Andreas Beyersdorf, Luke Ziemba, Lee Thornhill, Edward Winstead, Tracey Holloway, and Timothy H. Bertram

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Short summary
Correctly predicting aerosol surface area concentrations is important for determining the rate of heterogeneous reactions in chemical transport models. Here, we compare aircraft measurements of aerosol surface area with a regional model. In polluted air masses, we show that the model underpredicts aerosol surface area by a factor of 2. Despite this disagreement, the representation of heterogeneous chemistry still dominates the overall uncertainty in the loss rate of molecules such as N2O5.
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