Articles | Volume 19, issue 9
Atmos. Chem. Phys., 19, 5959–5971, 2019
https://doi.org/10.5194/acp-19-5959-2019
Atmos. Chem. Phys., 19, 5959–5971, 2019
https://doi.org/10.5194/acp-19-5959-2019

Research article 07 May 2019

Research article | 07 May 2019

Timescales of secondary organic aerosols to reach equilibrium at various temperatures and relative humidities

Ying Li and Manabu Shiraiwa

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Cited articles

Angell, C.: Relaxation in liquids, polymers and plastic crystals – strong/fragile patterns and problems, J. Non-Cryst. Solids, 131-133, 13–31, https://doi.org/10.1016/0022-3093(91)90266-9, 1991. 
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Bastelberger, S., Krieger, U. K., Luo, B., and Peter, T.: Diffusivity measurements of volatile organics in levitated viscous aerosol particles, Atmos. Chem. Phys., 17, 8453–8471, https://doi.org/10.5194/acp-17-8453-2017, 2017. 
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Short summary
Timescales for secondary organic aerosols (SOA) to reach equilibrium were estimated under various temperatures and relative humidities. Equilibration timescales in free troposphere can be longer than hours or days, even at moderate or relatively high relative humidities. These results provide critical insights into thermodynamic or kinetic treatments of SOA partitioning for accurate predictions of gas- and particle-phase concentrations of semi-volatile compounds in chemical transport models.
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