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Non-linear effects of secondary organic aerosol formation and properties in multi-precursor systems

Author

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  • Masayuki Takeuchi

    (Georgia Institute of Technology)

  • Thomas Berkemeier

    (Georgia Institute of Technology
    Max Planck Institute for Chemistry)

  • Gamze Eris

    (Georgia Institute of Technology)

  • Nga Lee Ng

    (Georgia Institute of Technology
    Georgia Institute of Technology
    Georgia Institute of Technology)

Abstract

Secondary organic aerosol (SOA) contributes significantly to ambient fine particulate matter that affects climate and human health. Monoterpenes represent an important class of biogenic volatile organic compounds (VOCs) and their oxidation by nitrate radicals poses a substantial source of SOA globally. Here, we investigate the formation and properties of SOA from nitrate radical oxidation of two common monoterpenes, α-pinene and limonene. When two monoterpenes are oxidized simultaneously, we observe a ~50% enhancement in the formation of SOA from α-pinene and a ~20% reduction in limonene SOA formation. The change in SOA yields is accompanied by pronounced changes in aerosol chemical composition and volatility. These non-linear effects are not observed in a sequential oxidation experiment. Our results highlight that unlike currently assumed in atmospheric models, the interaction of products formed from individual VOCs should be accounted for to accurately describe SOA formation and its climate and health impacts.

Suggested Citation

  • Masayuki Takeuchi & Thomas Berkemeier & Gamze Eris & Nga Lee Ng, 2022. "Non-linear effects of secondary organic aerosol formation and properties in multi-precursor systems," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35546-1
    DOI: 10.1038/s41467-022-35546-1
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    References listed on IDEAS

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    1. Manish Shrivastava & Meinrat O. Andreae & Paulo Artaxo & Henrique M. J. Barbosa & Larry K. Berg & Joel Brito & Joseph Ching & Richard C. Easter & Jiwen Fan & Jerome D. Fast & Zhe Feng & Jose D. Fuente, 2019. "Urban pollution greatly enhances formation of natural aerosols over the Amazon rainforest," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    2. Gordon McFiggans & Thomas F. Mentel & Jürgen Wildt & Iida Pullinen & Sungah Kang & Einhard Kleist & Sebastian Schmitt & Monika Springer & Ralf Tillmann & Cheng Wu & Defeng Zhao & Mattias Hallquist & , 2019. "Secondary organic aerosol reduced by mixture of atmospheric vapours," Nature, Nature, vol. 565(7741), pages 587-593, January.
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