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.
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.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 May 2023
Research article |
| 22 May 2023
| 22 May 2023
A seasonal analysis of aerosol NO3− sources and NOx oxidation pathways in the Southern Ocean marine boundary layer
Jessica M. Burger
CORRESPONDING AUTHOR
Department of Oceanography, University of Cape Town, Rondebosch, 7701, South Africa
Emily Joyce
Department of Earth, Environmental and Planetary Science, Brown University, Providence, RI 02906, USA
Institute at Brown for Environment and Society, Brown University, Providence, RI 02906, USA
Meredith G. Hastings
Department of Earth, Environmental and Planetary Science, Brown University, Providence, RI 02906, USA
Institute at Brown for Environment and Society, Brown University, Providence, RI 02906, USA
Kurt A. M. Spence
Department of Oceanography, University of Cape Town, Rondebosch, 7701, South Africa
Katye E. Altieri
Department of Oceanography, University of Cape Town, Rondebosch, 7701, South Africa
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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 NOx 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 NOx cycling and oxidant budgets in a data-sparse remote marine region.
A seasonal analysis of the nitrogen isotopes of atmospheric nitrate over the remote Southern...
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