Coordinated health effects attributable to particulate matter and other pollutants exposures in the North China Plain.

Hebei Province, located in the North China Plain (NCP) and encircling Beijing and Tianjin, has been suffering from severe air pollution. The monthly average fine particulate matter (PM) concentration was up to 276 μg/m in Hebei Province, which adversely affects human health. However, few studies evaluated the coordinated health impact of exposure to PM (PM and PM) and other key air pollutants (SO, NO, CO, and surface ozone (O)).

Comprehensive Insights Into O Changes During the COVID-19 From O Formation Regime and Atmospheric Oxidation Capacity.

Economic activities and the associated emissions have significantly declined during the 2019 novel coronavirus (COVID-19) pandemic, which has created a natural experiment to assess the impact of the emitted precursor control policy on ozone (O) pollution. In this study, we utilized comprehensive satellite, ground-level observations, and source-oriented chemical transport modeling to investigate the O variations during the COVID-19 pandemic in China. Here, we found that the significant elevated O in the North China Plain (40%) and Yangtze River Delta (35%) were mainly attributed to the enhanced atmospheric oxidation capacity (AOC) in these regions, associated with the meteorology and emission reduction during lockdown.