Articles | Volume 19, issue 10
Atmos. Chem. Phys., 19, 6879–6891, 2019
https://doi.org/10.5194/acp-19-6879-2019

Special issue: Regional transport and transformation of air pollution in...

Atmos. Chem. Phys., 19, 6879–6891, 2019
https://doi.org/10.5194/acp-19-6879-2019

Research article 23 May 2019

Research article | 23 May 2019

Evaluating the “2+26” regional strategy for air quality improvement during two air pollution alerts in Beijing: variations in PM2.5 concentrations, source apportionment, and the relative contribution of local emission and regional transport

Ziyue Chen et al.

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Short summary
This research is the first attempt to comprehensively evaluate the recent 2+26 strategy for air quality improvement in Beijing. We additionally considered two corresponding pollution episodes with different emission-reduction strategies to comprehensively understand the effects of 2+26 strategy. The findings suggested that red alerts be employed in heavy pollution episodes to intentionally reduce vehicle exhaust, which has become the dominant source for high PM2.5 concentrations in Beijing.
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