Simulated photochemical response to  observational constraints on aerosol vertical distribution over North China

Chen, Xi; Li, Ke; Yang, Ting; Jin, Xipeng; Chen, Lei; Yang, Yang; Zhao, Shuman; Hu, Bo; Zhu, Bin; Wang, Zifa; Liao, Hong

doi:10.5194/acp-25-9151-2025

Articles | Volume 25, issue 16

https://doi.org/10.5194/acp-25-9151-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-9151-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 16

Research article

|

22 Aug 2025

Research article |

| 22 Aug 2025

Simulated photochemical response to observational constraints on aerosol vertical distribution over North China

Xi Chen, Ke Li, Ting Yang, Xipeng Jin, Lei Chen, Yang Yang, Shuman Zhao, Bo Hu, Bin Zhu, Zifa Wang, and Hong Liao

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Mar 2025	268	34	14	316
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May 2025	116	16	12	144
Jun 2025	94	40	14	148
Jul 2025	66	22	2	90
Aug 2025	1,187	33	8	1,228
Sep 2025	1,569	35	15	1,619
Oct 2025	142	33	5	180
Nov 2025	151	55	12	218
Dec 2025	191	74	21	286
Jan 2026	182	64	19	265
Feb 2026	114	52	12	178
Mar 2026	184	105	21	310
Apr 2026	115	46	14	175
May 2026	80	35	17	132
Jun 2026	21	6	6	33
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Cumulative views and downloads (calculated since 04 Mar 2025)

Month	HTML	PDF	XML	Total
Mar 2025	268	34	14	316
Apr 2025	166	30	4	200
May 2025	116	16	12	144
Jun 2025	94	40	14	148
Jul 2025	66	22	2	90
Aug 2025	1,187	33	8	1,228
Sep 2025	1,569	35	15	1,619
Oct 2025	142	33	5	180
Nov 2025	151	55	12	218
Dec 2025	191	74	21	286
Jan 2026	182	64	19	265
Feb 2026	114	52	12	178
Mar 2026	184	105	21	310
Apr 2026	115	46	14	175
May 2026	80	35	17	132
Jun 2026	21	6	6	33
Jul 2026	15	13	6	34

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Short summary

Aerosol vertical distribution that plays a crucial role in aerosol–photolysis interaction (API) remains underrepresented in chemical models. We integrated lidar and radiosonde observations to constrain the simulated aerosol profiles over North China and quantified the photochemical responses. The increased photolysis rates in the lower layers led to increased ozone and accounted for a 36 %–56 % reduction in API effects, resulting in enhanced atmospheric oxidizing capacity and aerosol formation.