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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2024 > Accepted Manuscript

Effectiveness of precursor emission reductions for the control of summertime ozone and PM2.5 in the Beijing–Tianjin–Hebei region under different meteorological conditions

  • Nanjing University of Information Science and Technology School of Environmental Science and Engineering

Fund Project:

the National Natural Science Foundation of China (Grant No. 91744311)


doi:  10.1007/s00376-024-4071-4

  • We used the observed concentrations of air pollutants, reanalyzed meteorological parameters, and the results from the Goddard Earth Observing System Chemical Transport Model (GEOS-Chem) to examine the relationships between maximum daily 8 h average ozone (MDA8 O3), PM2.5 (particulate matter with diameter of 2.5 µm or less), PM2.5 components and 2 m temperature (T2)/relative humidity (RH) as well as the effectiveness of precursor emission reductions on the control of O3 and PM2.5 in Beijing–Tianjin–Hebei (BTH) under different summertime temperature and humidity conditions. Both observed (simulated) MDA8 O3 and PM2.5 concentrations increased as T2 went up, with linear trends of 4.8 (3.2) ppb ℃−1 and 1.9 (1.5) µg m−3 ℃−1, respectively. Model results showed that the decreases in MDA8 O3 from precursor emission reductions were more sensitive to T2 than to RH. Reducing a larger proportion of volatile organic compounds (VOCs) emissions at higher T2 was more effective for the control of summertime O3 in BTH. For the control of summertime PM2.5 in BTH, nitrogen oxides (NOx) reduction combined with a small proportion reduction of VOCs was the best measure. The magnitude of reduction in PM2.5 from reducing precursor emissions was more sensitive to RH than to T2, with the best efficiency at high RH. Results from this study are helpful for formulating effective policies to tackle O3 and PM2.5 pollution in BTH.
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    • Manuscript History

    Manuscript received: 22 February 2024
    Manuscript revised: 12 April 2024
    Manuscript accepted: 23 April 2024
    通讯作者: 陈斌, bchen63@163.com
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Effectiveness of precursor emission reductions for the control of summertime ozone and PM2.5 in the Beijing–Tianjin–Hebei region under different meteorological conditions

    • Manuscript received: 2024-02-22
    • Manuscript revised: 2024-04-12
    • Manuscript accepted: 2024-04-23

    Abstract: We used the observed concentrations of air pollutants, reanalyzed meteorological parameters, and the results from the Goddard Earth Observing System Chemical Transport Model (GEOS-Chem) to examine the relationships between maximum daily 8 h average ozone (MDA8 O3), PM2.5 (particulate matter with diameter of 2.5 µm or less), PM2.5 components and 2 m temperature (T2)/relative humidity (RH) as well as the effectiveness of precursor emission reductions on the control of O3 and PM2.5 in Beijing–Tianjin–Hebei (BTH) under different summertime temperature and humidity conditions. Both observed (simulated) MDA8 O3 and PM2.5 concentrations increased as T2 went up, with linear trends of 4.8 (3.2) ppb ℃−1 and 1.9 (1.5) µg m−3 ℃−1, respectively. Model results showed that the decreases in MDA8 O3 from precursor emission reductions were more sensitive to T2 than to RH. Reducing a larger proportion of volatile organic compounds (VOCs) emissions at higher T2 was more effective for the control of summertime O3 in BTH. For the control of summertime PM2.5 in BTH, nitrogen oxides (NOx) reduction combined with a small proportion reduction of VOCs was the best measure. The magnitude of reduction in PM2.5 from reducing precursor emissions was more sensitive to RH than to T2, with the best efficiency at high RH. Results from this study are helpful for formulating effective policies to tackle O3 and PM2.5 pollution in BTH.

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