Articles | Volume 20, issue 13
Atmos. Chem. Phys., 20, 8201–8225, 2020
https://doi.org/10.5194/acp-20-8201-2020
Atmos. Chem. Phys., 20, 8201–8225, 2020
https://doi.org/10.5194/acp-20-8201-2020

Research article 16 Jul 2020

Research article | 16 Jul 2020

Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model

Ryan Schmedding et al.

Model code and software

CMAQ (Version 5.2.1) US EPA Office of Research and Development https://doi.org/10.5281/zenodo.1212601

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Short summary
Accurate model prediction of aerosol concentrations is a known challenge. It is assumed in many modeling systems that aerosols are in a homogeneously mixed phase state. It has been observed that aerosols do phase separate and can form a highly viscous organic shell with an aqueous core impacting the formation processes of aerosols. This work is a model implementation to determine an aerosol's phase state using glass transition temperature and aerosol composition.
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