Ground ozone rise during the 2022 Shanghai lockdown caused by the unfavorable emission reduction ratio of nitrogen oxides and volatile organic compounds.

ABSTRACT: Ground-level ozone (O₃) pollution has shifted from a scientific issue to a key focus of governmental action in China. In recent years, the concentration of NO₂ in Shanghai has shown a decreasing trend of 3.7% annually, but ozone concentrations have exhibited significant interannual variability, particularly with a noticeable increase in 2022. This study focuses on investigating the mechanisms behind the increase in ozone concentration during the COVID-19 pandemic control period in 2022 in Shanghai, utilizing a combination of ground observation data, observation-based models, and chemical transport models for analysis. The results indicate that during the lockdown period, the MDA8 in Shanghai increased by 17 μg/m³ compared to before, with emission-related fa

SUBMITTER: Wang Q 

PROVIDER: S-EPMC11864278 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature