Source attribution of near-surface ozone trends  in the United States during 1995–2019

Li, Pengwei; Yang, Yang; Wang, Hailong; Li, Su; Li, Ke; Wang, Pinya; Li, Baojie; Liao, Hong

doi:https://doi.org/10.5194/acp-23-5403-2023

Articles | Volume 23, issue 9

https://doi.org/10.5194/acp-23-5403-2023

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

https://doi.org/10.5194/acp-23-5403-2023

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

Articles | Volume 23, issue 9

Research article

|

15 May 2023

Research article |

| 15 May 2023

Source attribution of near-surface ozone trends in the United States during 1995–2019

Pengwei Li, Yang Yang, Hailong Wang, Su Li, Ke Li, Pinya Wang, Baojie Li, and Hong Liao

Supplement

https://doi.org/10.5194/acp-23-5403-2023-supplement

Data sets

MERRA-2 reanalysis data NASA https://goldsmr5.gesdisc.eosdis.nasa.gov/data/MERRA2/M2I6NVANA.5.12.4/

Ozone Daily Summary Date EPA https://aqs.epa.gov/aqsweb/airdata/download_files.html#Daily

Data for "Source attribution of near-surface ozone in the United States during 1995-2019" Y. Yang https://doi.org/10.5281/zenodo.6891316

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Short summary

We use a novel technique that can attribute O₃ to precursors to investigate O₃ changes in the United States during 1995–2019. We found that the US domestic energy and surface transportation emission reductions are primarily responsible for the O₃ decrease in summer. In winter, factors such as nitrogen oxide emission reduction in the context of its inhibition of ozone production, increased aviation and shipping activities, and large-scale circulation changes contribute to the O₃ increases.