Increased Urban Ozone in Heat Waves due to Temperature-Induced Emissions of Anthropogenic Volatile Organic Compounds.

ABSTRACT: Urban ozone (O₃) pollution correlates with temperature, and higher O₃ often occurs during heat waves, threatening public health. However, limited data on how anthropogenic volatile organic compound (AVOC) precursor emissions vary with temperature hinders understanding their impact on O₃. Here, we show that the increase in non-combustion AVOC emissions (e.g., from volatile chemical products) during a heat wave in Shanghai contributes significantly to increased O₃, based on ambient measurements, emission testing, and air quality modelling. AVOC concentrations increase ~2× when the temperature increases from 25 °C to 35 °C due to air stagnation and increased emissions. During the heat wave, higher concentrations result in an 82% increase in VOC OH r

SUBMITTER: Qin M 

PROVIDER: S-EPMC12180938 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature