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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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Manabu Shiraiwa on behalf of the Authors (05 Apr 2019)  Author's response    Manuscript
ED: Publish as is (25 Apr 2019) by David Topping
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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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