Articles | Volume 21, issue 21
Atmos. Chem. Phys., 21, 16219–16235, 2021
https://doi.org/10.5194/acp-21-16219-2021
Atmos. Chem. Phys., 21, 16219–16235, 2021
https://doi.org/10.5194/acp-21-16219-2021
Measurement report
04 Nov 2021
Measurement report | 04 Nov 2021

Measurement report: Spatiotemporal and policy-related variations of PM2.5 composition and sources during 2015–2019 at multiple sites in a Chinese megacity

Xinyao Feng et al.

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Short summary
This study focused on PM2.5 compositions and sources and explored their spatiotemporal and policy-related variations based on observation at 19 sites during wintertime of 2015–2019 in a fast-developing megacity. We found that PM2.5 compositions for the outermost zone in 2019 were similar to those for the core zone 2 or 3 years ago. Percentage contributions of coal and biomass combustion dramatically declined in the core zone, while the traffic source showed an increasing trend.
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