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Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2

Author

Listed:
  • Xiang Peng

    (the Hong Kong Polytechnic University
    China National Environmental Monitoring Center)

  • Tao Wang

    (the Hong Kong Polytechnic University)

  • Weihao Wang

    (the Hong Kong Polytechnic University
    Hangzhou PuYu Technology Development Co., Ltd)

  • A. R. Ravishankara

    (Colorado State University)

  • Christian George

    (Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON)

  • Men Xia

    (the Hong Kong Polytechnic University)

  • Min Cai

    (Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), CNRS/OSUC)

  • Qinyi Li

    (Institute of Physical Chemistry Rocasolano, CSIC)

  • Christian Mark Salvador

    (University of Gothenburg
    Energy and Emerging Technology Research and Development, Bicutan)

  • Chiho Lau

    (Air Science Group Environmental Protection Department, HKSAR)

  • Xiaopu Lyu

    (the Hong Kong Polytechnic University)

  • Chun Nan Poon

    (the Hong Kong Polytechnic University)

  • Abdelwahid Mellouki

    (Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), CNRS/OSUC)

  • Yujing Mu

    (Chinese Academy of Sciences)

  • Mattias Hallquist

    (University of Gothenburg)

  • Alfonso Saiz-Lopez

    (Institute of Physical Chemistry Rocasolano, CSIC)

  • Hai Guo

    (the Hong Kong Polytechnic University)

  • Hartmut Herrmann

    (Leibniz Institute for Tropospheric Research (TROPOS), Atmospheric Chemistry Department (ACD)
    Shandong University)

  • Chuan Yu

    (the Hong Kong Polytechnic University
    Shandong University)

  • Jianing Dai

    (the Hong Kong Polytechnic University
    Environmental Modeling Group, Max Planck Institute for Meteorology)

  • Yanan Wang

    (the Hong Kong Polytechnic University)

  • Xinke Wang

    (Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON)

  • Alfred Yu

    (Air Science Group Environmental Protection Department, HKSAR)

  • Kenneth Leung

    (Air Science Group Environmental Protection Department, HKSAR)

  • Shuncheng Lee

    (the Hong Kong Polytechnic University)

  • Jianmin Chen

    (Fudan University, Institute of Atmospheric Sciences)

Abstract

Chlorine atoms (Cl) are highly reactive and can strongly influence the abundances of climate and air quality-relevant trace gases. Despite extensive research on molecular chlorine (Cl2), a Cl precursor, in the polar atmosphere, its sources in other regions are still poorly understood. Here we report the daytime Cl2 concentrations of up to 1 ppbv observed in a coastal area of Hong Kong, revealing a large daytime source of Cl2 (2.7 pptv s−1 at noon). Field and laboratory experiments indicate that photodissociation of particulate nitrate by sunlight under acidic conditions (pH

Suggested Citation

  • Xiang Peng & Tao Wang & Weihao Wang & A. R. Ravishankara & Christian George & Men Xia & Min Cai & Qinyi Li & Christian Mark Salvador & Chiho Lau & Xiaopu Lyu & Chun Nan Poon & Abdelwahid Mellouki & Yu, 2022. "Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28383-9
    DOI: 10.1038/s41467-022-28383-9
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    References listed on IDEAS

    as
    1. Joel A. Thornton & James P. Kercher & Theran P. Riedel & Nicholas L. Wagner & Julie Cozic & John S. Holloway & William P. Dubé & Glenn M. Wolfe & Patricia K. Quinn & Ann M. Middlebrook & Becky Alexand, 2010. "A large atomic chlorine source inferred from mid-continental reactive nitrogen chemistry," Nature, Nature, vol. 464(7286), pages 271-274, March.
    2. Peter M. Edwards & Steven S. Brown & James M. Roberts & Ravan Ahmadov & Robert M. Banta & Joost A. deGouw & William P. Dubé & Robert A. Field & James H. Flynn & Jessica B. Gilman & Martin Graus & Detl, 2014. "High winter ozone pollution from carbonyl photolysis in an oil and gas basin," Nature, Nature, vol. 514(7522), pages 351-354, October.
    3. C. W. Spicer & E. G. Chapman & B. J. Finlayson-Pitts & R. A. Plastridge & J. M. Hubbe & J. D. Fast & C. M. Berkowitz, 1998. "Unexpectedly high concentrations of molecular chlorine in coastal air," Nature, Nature, vol. 394(6691), pages 353-356, July.
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