Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 16
Articles | Volume 26, issue 16
https://doi.org/10.5194/acp-26-11785-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-11785-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 16
Measurement report
 | 
20 Aug 2026
Measurement report |  | 20 Aug 2026

Measurement Report: Quantitative analysis of aerosol acidity and its driving factors in Guanzhong area, Northwest China

Qian Wang, Xiao Guo, Minxia Shen, Yali Liu, Yifan Zhang, Lu Li, Weining Qi, Yue Cao, Shicong Li, Zhuoer Dong, Wenting Dai, and Jianjun Li

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Short summary
We studied fine particle acidity over one year in northwest China. Average pH was 3.8, highest in winter, lowest in summer. Pollution made particles less acidic. Temperature drove seasonal changes; ammonia was key in autumn and winter, dust calcium in spring, and humidity in summer. Humidity had a non-linear effect around 60–85% relative humidity. Our results enhance the understanding of the contributions of various factors to aerosol pH.
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