Articles | Volume 19, issue 13
Atmos. Chem. Phys., 19, 8721–8739, 2019
https://doi.org/10.5194/acp-19-8721-2019

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

Atmos. Chem. Phys., 19, 8721–8739, 2019
https://doi.org/10.5194/acp-19-8721-2019

Research article 10 Jul 2019

Research article | 10 Jul 2019

Is water vapor a key player of the wintertime haze in North China Plain?

Jiarui Wu et al.

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AR by Guohui Li on behalf of the Authors (26 May 2019)  Author's response    Manuscript
ED: Publish as is (06 Jun 2019) by Renyi Zhang
Short summary
The near-surface PM2.5 contribution of the ALW total effect is 17.5 % in NCP, indicating that ALW plays an important role in the PM2.5 formation during the wintertime haze pollution. Moreover, the ALW-HET overwhelmingly dominates the PM2.5 enhancement due to the ALW. The ALW does not consistently enhance near-surface [PM2.5] with increasing RH. When the RH exceeds 80 %, the contribution of the ALW begins to decrease, which is caused by the high occurrence frequencies of precipitation.
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