Articles | Volume 23, issue 21
https://doi.org/10.5194/acp-23-13555-2023
https://doi.org/10.5194/acp-23-13555-2023
Research article
 | 
30 Oct 2023
Research article |  | 30 Oct 2023

Effects of simulated secondary organic aerosol water on PM1 levels and composition over the US

Stylianos Kakavas, Spyros N. Pandis, and Athanasios Nenes

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Latest update: 21 Feb 2024
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Short summary
Water uptake from organic species in aerosol can affect the partitioning of semi-volatile inorganic compounds but are not considered in global and chemical transport models. We address this with a version of the PM-CAMx model that considers such organic water effects and use it to carry out 1-year aerosol simulations over the continental US. We show that such organic water impacts can increase dry PM1 levels by up to 2 μg m-3 when RH levels and PM1 concentrations are high.
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