Open Access Article
Contemporary Natural Sciences DOI: .
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发布时间: 2026-08-19 总浏览量: 23
Urban atmospheric particulate matter is a complex pollutant resulting from the combined effects of primary emissions and secondary formation. Drawing on nationwide simulations, observations from representative cities, and quasi-experimental studies, this paper analyzes the size distribution, spatiotemporal variation, formation mechanisms, and impacts of urban atmospheric particulate matter. The results indicate that emission intensity determines the baseline pollution level, while secondary transformation, regional transport, and boundary-layer meteorology jointly shape individual pollution episodes. Emission-control measures have been the primary driver of the decline in particulate matter concentrations in recent years; nevertheless, stagnant and humid conditions continue to amplify pollution. Future efforts should prioritize the coordinated reduction of multiple pollutants, joint regional prevention and control, and exposure-oriented management.
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