Factors controlling the evaporation of secondary organic aerosol from α-pinene ozonolysis

Geophysical Research Letters
Taina Yli-JuutiAnnele Virtanen

Abstract

Secondary organic aerosols (SOA) forms a major fraction of organic aerosols in the atmosphere. Knowledge of SOA properties that affect their dynamics in the atmosphere is needed for improving climate models. By combining experimental and modeling techniques, we investigated the factors controlling SOA evaporation under different humidity conditions. Our experiments support the conclusion of particle phase diffusivity limiting the evaporation under dry conditions. Viscosity of particles at dry conditions was estimated to increase several orders of magnitude during evaporation, up to 109 Pa s. However, at atmospherically relevant relative humidity and time scales, our results show that diffusion limitations may have a minor effect on evaporation of the studied α-pinene SOA particles. Based on previous studies and our model simulations, we suggest that, in warm environments dominated by biogenic emissions, the major uncertainty in models describing the SOA particle evaporation is related to the volatility of SOA constituents.

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Citations

Nov 2, 2019·Environmental Science. Processes & Impacts·Allison C Vander WallBarbara J Finlayson-Pitts
Nov 28, 2018·Physical Chemistry Chemical Physics : PCCP·Pablo Corral ArroyoSergey A Nizkorodov
May 26, 2018·Physical Chemistry Chemical Physics : PCCP·Aleksandra MarshMarkus Dirk Petters
Mar 8, 2018·Nature Communications·Jonathan P ReidGrazia Rovelli
Dec 10, 2017·The Journal of Chemical Physics·Elias M NeemanThérèse R Huet
May 29, 2018·Physical Chemistry Chemical Physics : PCCP·Frances H MarshallJonathan P Reid
Jan 9, 2021·Environmental Science & Technology·Yicong HeShantanu H Jathar
Apr 17, 2021·The Journal of Physical Chemistry. a·Stephen IngramJonathan P Reid
May 8, 2021·Environmental Science & Technology·Veronika PospisilovaJay G Slowik
Dec 16, 2017·Environmental Science & Technology·Rahul A ZaveriDouglas R Worsnop
May 29, 2020·Environmental Science & Technology·Amy E ChristiansenWilliam C Porter
Jan 30, 2020·Environmental Science & Technology·Rahul A ZaveriAlexander Laskin
Oct 21, 2021·Environmental Science & Technology·Avery B Dalton, Sergey A Nizkorodov

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