Evolution of Ozone Pollution in China: What Track Will It Follow?

• DOI: 10.1021/acs.est.2c08205
• Publication Date: 2022-12-28T19:46:29Z
• Authors: Jia Guo; Xiaoshan Zhang; Yi Gao; Zhangwei Wang; Meigen Zhang; Wenbo Xue; Hartmut Herrmann; Guy Pierre Brasseur; Tao Wang; Zhe Wang
• Keywords: China; Air pollution mitigation; ozone pollution; Nitrogen Dioxide; 050; Ozone formation regime; 01 natural sciences; 333; Ozone pollution; Ozone; ozone formation regime; Air Pollution; 11. Sustainability; diagnosis approach; Ozone-precursor relationship; ozone−precursor relationship; ozone-precursor relationship; 0105 earth and related environmental sciences; Air Pollutants; Volatile Organic Compounds; 333.7; 13. Climate action; Diagnosis approach; air pollution mitigation; Environmental Monitoring

Increasing surface ozone (O3) concentrations has emerged as a key air pollution problem in many urban regions worldwide the last decade. A longstanding major issue tackling is identification of O3 formation regime and its sensitivity to precursor emissions. In this work, we propose new transformed empirical kinetic modeling approach (EKMA) diagnose using regulatory NO2 observation datasets, which are easily accessible. We demonstrate that mapping monitored data on modeled regional O3–NO2 relationship diagram can illustrate historical evolution precursors region. By applying approach, show for most China, currently associated with volatile organic compound (VOC)-limited regime, located within zone daytime-produced (DPO3) an 8h-NO2 concentration ratio below 8.3 ([DPO3]/[8h-NO2] ≤ 8.3). The production controlling effects VOCs NOx different cities China were compared according their routes. developed herein may have broad application potential evaluating efficiency controls further mitigating pollution, particular, where comprehensive photochemical studies unavailable.