Articles | Volume 22, issue 19
https://doi.org/10.5194/acp-22-12985-2022
© Author(s) 2022. 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-22-12985-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Oct 2022
Research article |
| 10 Oct 2022
| 10 Oct 2022
Changing ozone sensitivity in the South Coast Air Basin during the COVID-19 period
Jason R. Schroeder
CORRESPONDING AUTHOR
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
Chenxia Cai
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
Jin Xu
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
David Ridley
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
Jin Lu
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
Nancy Bui
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
now at: ICF Consulting, 980 9th Street, Sacramento, CA, USA
Jeremy Avise
California Air Resources Board, 1001 I Street, Sacramento, CA, USA
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Total article views: 1,575 (including HTML, PDF, and XML)
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Total article views: 897 (including HTML, PDF, and XML)
Thereof 897 with geography defined
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Cited
14 citations as recorded by crossref.
- Unexpected deterioration of O3 pollution in the South Coast Air Basin of California: The role of meteorology and emissions K. Wu et al. 10.1016/j.envpol.2023.121728
- Impact of COVID-19 pandemic on greenhouse gas and criteria air pollutant emissions from the San Pedro Bay Ports and future policy implications J. Zhang et al. 10.1088/1748-9326/ad7747
- A traffic-induced shift of ultrafine particle sources under COVID-19 soft lockdown in a subtropical urban area T. Chen et al. 10.1016/j.envint.2024.108658
- Identifying the Causes of Air Pollution in the Tehran Metropolis-Iran and Policy Recommendations for Sustainability A. Ghahremanlou & D. Ghahremanlou 10.1007/s41810-025-00303-6
- Examining the sensitivity of ozone to NOx and VOCs in the Salt Lake City urban region from spatiotemporal patterns observed using stationary and mobile observations collected from a light-rail public transit platform A. Gonzalez et al. 10.1016/j.atmosenv.2024.120686
- What caused ozone pollution during the 2022 Shanghai lockdown? Insights from ground and satellite observations Y. Tan & T. Wang 10.5194/acp-22-14455-2022
- Urban ozone formation and sensitivities to volatile chemical products, cooking emissions, and NOx upwind of and within two Los Angeles Basin cities C. Stockwell et al. 10.5194/acp-25-1121-2025
- Simultaneous decreases in NO2 levels and disparities in California during the COVID-19 pandemic H. Lee et al. 10.1016/j.atmosenv.2023.120214
- Primary Radical Effectiveness: Do the Different Chemical Reactivities of Hydroxyl and Chlorine Radicals Matter for Tropospheric Oxidation? P. Edwards & C. Young 10.1021/acsestair.3c00108
- Changing ozone sensitivity in Fujian Province, China, during 2012–2021: Importance of controlling VOC emissions N. Chen et al. 10.1016/j.envpol.2024.124757
- Reducing southern California ozone concentrations in the year 2050 under a low carbon energy scenario Y. Zhao et al. 10.1016/j.atmosenv.2023.120315
- COVID-19 perturbation on US air quality and human health impact assessment J. He et al. 10.1093/pnasnexus/pgad483
- O3 Sensitivity to NOx and VOC During RECAP-CA: Implication for Emissions Control Strategies S. Wu et al. 10.1021/acsestair.4c00026
- Air quality and urban climate improvements in the world’s most populated region during the COVID-19 pandemic A. Damiani et al. 10.1088/1748-9326/ad25a2
14 citations as recorded by crossref.
- Unexpected deterioration of O3 pollution in the South Coast Air Basin of California: The role of meteorology and emissions K. Wu et al. 10.1016/j.envpol.2023.121728
- Impact of COVID-19 pandemic on greenhouse gas and criteria air pollutant emissions from the San Pedro Bay Ports and future policy implications J. Zhang et al. 10.1088/1748-9326/ad7747
- A traffic-induced shift of ultrafine particle sources under COVID-19 soft lockdown in a subtropical urban area T. Chen et al. 10.1016/j.envint.2024.108658
- Identifying the Causes of Air Pollution in the Tehran Metropolis-Iran and Policy Recommendations for Sustainability A. Ghahremanlou & D. Ghahremanlou 10.1007/s41810-025-00303-6
- Examining the sensitivity of ozone to NOx and VOCs in the Salt Lake City urban region from spatiotemporal patterns observed using stationary and mobile observations collected from a light-rail public transit platform A. Gonzalez et al. 10.1016/j.atmosenv.2024.120686
- What caused ozone pollution during the 2022 Shanghai lockdown? Insights from ground and satellite observations Y. Tan & T. Wang 10.5194/acp-22-14455-2022
- Urban ozone formation and sensitivities to volatile chemical products, cooking emissions, and NOx upwind of and within two Los Angeles Basin cities C. Stockwell et al. 10.5194/acp-25-1121-2025
- Simultaneous decreases in NO2 levels and disparities in California during the COVID-19 pandemic H. Lee et al. 10.1016/j.atmosenv.2023.120214
- Primary Radical Effectiveness: Do the Different Chemical Reactivities of Hydroxyl and Chlorine Radicals Matter for Tropospheric Oxidation? P. Edwards & C. Young 10.1021/acsestair.3c00108
- Changing ozone sensitivity in Fujian Province, China, during 2012–2021: Importance of controlling VOC emissions N. Chen et al. 10.1016/j.envpol.2024.124757
- Reducing southern California ozone concentrations in the year 2050 under a low carbon energy scenario Y. Zhao et al. 10.1016/j.atmosenv.2023.120315
- COVID-19 perturbation on US air quality and human health impact assessment J. He et al. 10.1093/pnasnexus/pgad483
- O3 Sensitivity to NOx and VOC During RECAP-CA: Implication for Emissions Control Strategies S. Wu et al. 10.1021/acsestair.4c00026
- Air quality and urban climate improvements in the world’s most populated region during the COVID-19 pandemic A. Damiani et al. 10.1088/1748-9326/ad25a2
Latest update: 07 May 2025
Short summary
Ozone, a key component of smog, has plagued the Los Angeles (LA) region for decades. Ozone is created by complex chemical reactions that can be greatly impacted by anthropogenic emissions. This study makes use of the COVID-19 period to study the sensitivity of ozone chemistry in LA to certain anthropogenic emissions, notably from vehicles. We find that vehicular emissions of key pollutants dropped by up to 25 % during COVID-19, which caused a fundamental shift in ozone chemistry in the region.
Ozone, a key component of smog, has plagued the Los Angeles (LA) region for decades. Ozone is...
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