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Natural halogens buffer tropospheric ozone in a changing climate

Author

Listed:
  • Fernando Iglesias-Suarez

    (Institute of Physical Chemistry Rocasolano, CSIC
    Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre)

  • Alba Badia

    (Institute of Physical Chemistry Rocasolano, CSIC
    Universitat Autònoma de Barcelona (UAB))

  • Rafael P. Fernandez

    (Institute of Physical Chemistry Rocasolano, CSIC
    FCEN-UNCuyo, UTN-FRM)

  • Carlos A. Cuevas

    (Institute of Physical Chemistry Rocasolano, CSIC)

  • Douglas E. Kinnison

    (Atmospheric Chemistry Observations and Modelling, NCAR)

  • Simone Tilmes

    (Atmospheric Chemistry Observations and Modelling, NCAR)

  • Jean-François Lamarque

    (Atmospheric Chemistry Observations and Modelling, NCAR)

  • Mathew C. Long

    (Climate and Global Dynamics Laboratory, NCAR)

  • Ryan Hossaini

    (Lancaster University)

  • Alfonso Saiz-Lopez

    (Institute of Physical Chemistry Rocasolano, CSIC)

Abstract

Reactive atmospheric halogens destroy tropospheric ozone (O3), an air pollutant and greenhouse gas. The primary source of natural halogens is emissions from marine phytoplankton and algae, as well as abiotic sources from ocean and tropospheric chemistry, but how their fluxes will change under climate warming, and the resulting impacts on O3, are not well known. Here, we use an Earth system model to estimate that natural halogens deplete approximately 13% of tropospheric O3 in the present-day climate. Despite increased levels of natural halogens through the twenty-first century, this fraction remains stable due to compensation from hemispheric, regional and vertical heterogeneity in tropospheric O3 loss. Notably, this halogen-driven O3 buffering is projected to be greatest over polluted and populated regions, due mainly to iodine chemistry, with important implications for air quality.

Suggested Citation

  • Fernando Iglesias-Suarez & Alba Badia & Rafael P. Fernandez & Carlos A. Cuevas & Douglas E. Kinnison & Simone Tilmes & Jean-François Lamarque & Mathew C. Long & Ryan Hossaini & Alfonso Saiz-Lopez, 2020. "Natural halogens buffer tropospheric ozone in a changing climate," Nature Climate Change, Nature, vol. 10(2), pages 147-154, February.
    • Handle: RePEc:nat:natcli:v:10:y:2020:i:2:d:10.1038_s41558-019-0675-6
    DOI: 10.1038/s41558-019-0675-6
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    Cited by:

    1. Qinyi Li & Rafael P. Fernandez & Ryan Hossaini & Fernando Iglesias-Suarez & Carlos A. Cuevas & Eric C. Apel & Douglas E. Kinnison & Jean-François Lamarque & Alfonso Saiz-Lopez, 2022. "Reactive halogens increase the global methane lifetime and radiative forcing in the 21st century," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Qinyi Li & Daphne Meidan & Peter Hess & Juan A. Añel & Carlos A. Cuevas & Scott Doney & Rafael P. Fernandez & Maarten Herpen & Lena Höglund-Isaksson & Matthew S. Johnson & Douglas E. Kinnison & Jean-F, 2023. "Global environmental implications of atmospheric methane removal through chlorine-mediated chemistry-climate interactions," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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