A seasonal analysis of aerosol NO3− sources and NOx oxidation pathways in the Southern Ocean marine boundary layer

Burger, Jessica M.; Joyce, Emily; Hastings, Meredith G.; Spence, Kurt A. M.; Altieri, Katye E.

doi:https://doi.org/10.5194/acp-23-5605-2023

Articles | Volume 23, issue 10

https://doi.org/10.5194/acp-23-5605-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-5605-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 10

Research article

|

22 May 2023

Research article |

| 22 May 2023

A seasonal analysis of aerosol NO₃⁻ sources and NO_x oxidation pathways in the Southern Ocean marine boundary layer

Jessica M. Burger, Emily Joyce, Meredith G. Hastings, Kurt A. M. Spence, and Katye E. Altieri

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https://doi.org/10.5194/acp-23-5605-2023-supplement

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A seasonal analysis of aerosol NO3- sources and NOx oxidation pathways in the Southern Ocean marine boundary layer Jessica M. Burger, Emily Joyce, Meredith G. Hastings, Kurt A. M. Spence, and Katye E. Altieri https://doi.org/10.5281/zenodo.7142722

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Short summary

A seasonal analysis of the nitrogen isotopes of atmospheric nitrate over the remote Southern Ocean reveals that similar natural NO_x sources dominate in spring and summer, while winter is representative of background-level conditions. The oxygen isotopes suggest that similar oxidation pathways involving more ozone occur in spring and winter, while the hydroxyl radical is the main oxidant in summer. This work helps to constrain NO_x cycling and oxidant budgets in a data-sparse remote marine region.