Insights into the long-term (2005–2021) spatiotemporal evolution of summer ozone production sensitivity in the Northern Hemisphere derived with the Ozone Monitoring Instrument (OMI)

Johnson, Matthew S.; Philip, Sajeev; Meech, Scott; Kumar, Rajesh; Sorek-Hamer, Meytar; Shiga, Yoichi P.; Jung, Jia

doi:https://doi.org/10.5194/acp-24-10363-2024

Articles | Volume 24, issue 18

https://doi.org/10.5194/acp-24-10363-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-10363-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 18

Research article

|

18 Sep 2024

Research article |

| 18 Sep 2024

Insights into the long-term (2005–2021) spatiotemporal evolution of summer ozone production sensitivity in the Northern Hemisphere derived with the Ozone Monitoring Instrument (OMI)

Matthew S. Johnson, Sajeev Philip, Scott Meech, Rajesh Kumar, Meytar Sorek-Hamer, Yoichi P. Shiga, and Jia Jung

Supplement

https://doi.org/10.5194/acp-24-10363-2024-supplement

Data sets

OMI/Aura Formaldehyde (HCHO) Total Column Daily L3 Weighted Mean Global 0.1deg Lat/Lon Grid V003 K. Chance https://doi.org/10.5067/Aura/OMI/DATA3010

Community Emissions Data System R. Hoesly et al. https://doi.org/10.5281/zenodo.12803197

OMI/Aura Nitrogen Dioxide (NO2) Total and Tropospheric Column 1-orbit L2 Swath 13x24 km V003 N. A. Krotkov et al. https://doi.org/10.5067/Aura/OMI/DATA2017

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Short summary

Satellites, like the Ozone Monitoring Instrument (OMI), retrieve proxy species of ozone (O₃) formation (formaldehyde and nitrogen dioxide) and the ratios (FNRs) which can define O₃production sensitivity regimes. Here we investigate trends of OMI FNRs from 2005 to 2021, and they have increased in major cities, suggesting a transition from radical- to NO_x-limited regimes. OMI also observed the impact of reduced emissions during the 2020 COVID-19 lockdown that resulted in increased FNRs.