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<p>China faces escalating ozone pollution challenges, with O<sub>3</sub> becoming the primary pollutant in summer since 2013 and exhibiting deteriorating compliance rates (Grade I attainment plummeted from 6.9 to 0.3% during 2015–2023). Critical hotspots include the Beijing–Tianjin–Hebei region (exceeding standards by 20&#xa0;µg/m<sup>3</sup>), driven by inadequate coordinated control of VOC and NO<sub>x</sub>. Analysis of the ABaCAS-EI v2.0 dataset (2005–2021) reveals divergent precursor trends: VOC emissions shifted from residential to industrial dominance, with industrial solvents (PRSO) surging 389% during 2005–2013 and comprising 61% of national totals by 2021. Spatially, eastern provinces (e.g., Guangdong) showed transport-industrial emission profiles (TRON: 28%; PRSO: 32%), while northern regions achieved significant NO<sub>x</sub> reductions through industrial restructuring, with Hebei’s emissions falling 46% from peak levels. Conversely, NO<sub>x</sub> emissions peaked earlier (2011), but transportation’s share grew to 42% by 2021 (TRON: 31%). Regional disparities persist—coastal areas leveraged advanced controls, whereas western provinces struggled with expanding pollution bases. These findings underscore the imperative for spatially-explicit strategies addressing sector-region heterogeneities to mitigate ozone’s health/ecological impacts.</p>

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Temporo-spatial Variations and Sector-Specific Analysis in the Emission Control of VOC and NOx, Two Important Precursors of Ozone Pollution, in China

  • 期刊论文

  • 发表日期：

    2025年11月30日

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  • Zongshuang Wang,
  • Jungang Lv

摘要

China faces escalating ozone pollution challenges, with O3 becoming the primary pollutant in summer since 2013 and exhibiting deteriorating compliance rates (Grade I attainment plummeted from 6.9 to 0.3% during 2015–2023). Critical hotspots include the Beijing–Tianjin–Hebei region (exceeding standards by 20 µg/m3), driven by inadequate coordinated control of VOC and NOx. Analysis of the ABaCAS-EI v2.0 dataset (2005–2021) reveals divergent precursor trends: VOC emissions shifted from residential to industrial dominance, with industrial solvents (PRSO) surging 389% during 2005–2013 and comprising 61% of national totals by 2021. Spatially, eastern provinces (e.g., Guangdong) showed transport-industrial emission profiles (TRON: 28%; PRSO: 32%), while northern regions achieved significant NOx reductions through industrial restructuring, with Hebei’s emissions falling 46% from peak levels. Conversely, NOx emissions peaked earlier (2011), but transportation’s share grew to 42% by 2021 (TRON: 31%). Regional disparities persist—coastal areas leveraged advanced controls, whereas western provinces struggled with expanding pollution bases. These findings underscore the imperative for spatially-explicit strategies addressing sector-region heterogeneities to mitigate ozone’s health/ecological impacts.