Deciphering decadal urban ozone trends from historical records since 1980.

ABSTRACT: Ozone pollution is a major environmental threat to human health. Timely assessment of ozone trends is crucial for informing environmental policy. Here we show that for the most recent decade (2013-2022) in the northern hemisphere, warm-season (April-September) mean daily 8-h average maximum ozone increases much faster in urban regions with top ozone levels (mainly in the North China Plain, 1.2 ± 1.3 ppbv year^-1) than in other, low-ozone regions (0.2 ± 0.9 ppbv year^-1). These trends widen the ozone differences across urban regions, and increase extreme pollution levels and health threats from a global perspective. Comparison of historical trends in different urban regions reveals that ozone increases in China during 2013-2022 differ in magnitude and mechanisms to histo

SUBMITTER: Wang H 

PROVIDER: S-EPMC11585278 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature