Molecular composition and processing of  aqueous secondary organic aerosol in clouds  at a mountain site in southeastern China

Jin, Yali; Luo, Hao; Tang, Siqi; Xue, Shuhui; Nie, Chengyu; Peng, Xiaocong; Zheng, Yan; Xu, Weiqi; Zhang, Guohua; Pan, Xiaole; Sun, Yele; Chen, Qi; Liu, Lanzhong; Zhao, Defeng

doi:10.5194/acp-26-2813-2026

Articles | Volume 26, issue 4

https://doi.org/10.5194/acp-26-2813-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-2813-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 4

Research article

|

25 Feb 2026

Research article |

| 25 Feb 2026

Molecular composition and processing of aqueous secondary organic aerosol in clouds at a mountain site in southeastern China

Yali Jin, Hao Luo, Siqi Tang, Shuhui Xue, Chengyu Nie, Xiaocong Peng, Yan Zheng, Weiqi Xu, Guohua Zhang, Xiaole Pan, Yele Sun, Qi Chen, Lanzhong Liu, and Defeng Zhao

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Cumulative views and downloads (calculated since 17 Sep 2025)

Month	HTML	PDF	XML	Total
Sep 2025	3,686	44	10	3,740
Oct 2025	418	72	20	510
Nov 2025	124	50	16	190
Dec 2025	132	46	14	192
Jan 2026	260	46	18	324
Feb 2026	308	86	6	400
Mar 2026	386	180	18	584
Apr 2026	172	111	11	294
May 2026	140	47	7	194
Jun 2026	14	5	2	21

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Short summary

Cloud substantially changes the compositions organic aerosol. How cloud processing of organics occur on molecular level remains unclear. We found that compared with cloud free particles, organics in cloud contains more large molecules likely due to accretion reactions and has more nitrogen-containing compounds. We identify some new compounds formed in cloud. Such modifications of the organics in cloud can further change its physicochemical properties, and impact on climate and human health.