Articles | Volume 19, issue 17
Atmos. Chem. Phys., 19, 11485–11499, 2019
https://doi.org/10.5194/acp-19-11485-2019
Atmos. Chem. Phys., 19, 11485–11499, 2019
https://doi.org/10.5194/acp-19-11485-2019

Research article 12 Sep 2019

Research article | 12 Sep 2019

Rapid transition in winter aerosol composition in Beijing from 2014 to 2017: response to clean air actions

Haiyan Li et al.

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Short summary
We combined the online observations of aerosol components and a regional chemical transport model to investigate the response of aerosol chemistry to the stringent clean air actions in Beijing. We found a rapid transition in winter aerosol composition from 2014 to 2017 with decreased sulfate contribution and increased nitrate fraction and evaluated the underlying drivers. The anthropogenic emission reductions in Beijing and its surrounding regions are identified to play a major role.
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