Drivers of Increasing Ozone during the Two Phases of Clean Air Actions in China 2013-2020.

ABSTRACT: In response to the severe air pollution issue, the Chinese government implemented two phases (Phase I, 2013-2017; Phase II, 2018-2020) of clean air actions since 2013, resulting in a significant decline in fine particles (PM_2.5) during 2013-2020, while the warm-season (April-September) mean maximum daily 8 h average ozone (MDA8 O₃) increased by 2.6 μg m^-3 yr^-1 in China during the same period. Here, we derived the drivers behind the rising O₃ concentrations during the two phases of clean air actions by using a bottom-up emission inventory, a regional chemical transport model, and a multiple linear regression model. We found that both meteorological variations (3.6 μg m^-3) and anthropogenic emissions (6.7 μg m^-3) co

SUBMITTER: Liu Y 

PROVIDER: S-EPMC10286302 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature