Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 19
Articles | Volume 26, issue 19
https://doi.org/10.5194/acp-26-14329-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-14329-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 19
Research article
 | 
12 Oct 2026
Research article |  | 12 Oct 2026

Simultaneous measurements of gas- and aerosol-phase water-soluble organic nitrogen in the winter urban atmosphere of Chengdu, China

Kaitao Chen, Zheng Li, Rui Li, Luyao Chen, Rongjie Li, Binyu Xiao, Shaojun Lv, Can Wu, Rui Li, Junke Zhang, and Gehui Wang

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Short summary
During winter haze in Chengdu, water-soluble organic nitrogen compounds shift from gas to particles, with concentrations more than doubling. The main driver is particle water content, not acidity or temperature. As particles absorb water, they take up these compounds, fueling aerosol growth. This study reveals how nitrogen-rich organic aerosols form in humid air, aiding pollution control strategies.
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