What the study found
Higher temperatures in 2023 helped produce more ground-level ozone in Jilin City, while changes in wind patterns and a lower planetary boundary layer height, the lower part of the atmosphere where air is mixed, influenced pollutant transport.
Why the authors say this matters
The authors conclude that localized, season-oriented strategies are important for reducing ozone exposure and public health harm. They also suggest that further improvement is possible because the air quality change from 2020 to 2023 was only slight.
What the researchers tested
The researchers studied summertime ground-level ozone in Jilin City from 2020 to 2023, focusing on May to July each year. They combined meteorological and air quality modeling using WRF v4.3.3 and CMAQ v5.4, along with data from monitoring stations, and they also assessed health risk with the Normalised Health-based Air Quality Index (NHAQI).
What worked and what didn't
The study found slight improvement in air quality from 2020 to 2023, and excess health risk decreased from 2.19% to 2.13%. The CMAQ model underpredicted peak summertime ozone, with a normalised mean bias ranging from −30.98% to −22.98%, and spatial analysis showed continuous high-risk areas, especially during stagnation periods in urban areas.
What to keep in mind
The abstract notes that the model underpredicted peak ozone and that accuracy should be improved through model changes, refined emission inventories, and targeted remedies at locations with excessive ozone. The available summary does not describe additional limitations beyond the study's focus on Jilin City and summertime conditions.
Key points
- Higher temperatures in 2023 were linked to greater ozone production.
- Wind pattern changes and lower planetary boundary layer height affected pollutant transport.
- The CMAQ model underpredicted peak ozone, with normalised mean bias from −30.98% to −22.98%.
- Excess health risk decreased slightly from 2.19% to 2.13% between 2020 and 2023.
- Continuous high-risk areas were found in urban locations, especially during stagnation periods.
Disclosure
- Research title:
- Summer ozone levels in Jilin were shaped by weather
- Authors:
- A. Akhtar, Chunsheng Fang, Muhammad Yousuf Jat Baloch, Ju Wang
- Publication date:
- 2026-02-25
- OpenAlex record:
- View
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