Role of aerosol–cloud–radiation interactions in modulating summertime quasi-biweekly rainfall  intensity over South China

Chen, Hongli; Hsu, Pang-Chi; Zhu, Anbao; Ma, Xiaoyan

doi:10.5194/acp-25-15765-2025

Articles | Volume 25, issue 22

https://doi.org/10.5194/acp-25-15765-2025

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

https://doi.org/10.5194/acp-25-15765-2025

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

Articles | Volume 25, issue 22

Research article

|

18 Nov 2025

Research article |

| 18 Nov 2025

Role of aerosol–cloud–radiation interactions in modulating summertime quasi-biweekly rainfall intensity over South China

Hongli Chen, Pang-Chi Hsu, Anbao Zhu, and Xiaoyan Ma

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Jun 2025	196	46	18	260
Jul 2025	92	18	6	116
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Sep 2025	1,008	38	14	1,060
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Nov 2025	396	85	19	500
Dec 2025	209	79	14	302
Jan 2026	146	127	21	294
Feb 2026	111	73	21	205
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Cumulative views and downloads (calculated since 04 Jun 2025)

Month	HTML	PDF	XML	Total
Jun 2025	196	46	18	260
Jul 2025	92	18	6	116
Aug 2025	216	28	6	250
Sep 2025	1,008	38	14	1,060
Oct 2025	56	18	4	78
Nov 2025	396	85	19	500
Dec 2025	209	79	14	302
Jan 2026	146	127	21	294
Feb 2026	111	73	21	205
Mar 2026	103	74	28	205
Apr 2026	123	83	12	218
May 2026	101	58	8	167
Jun 2026	19	7	4	30
Jul 2026	37	30	10	77

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Short summary

Previous studies mainly examined aerosol effects on short-term rainfall variations. Here we show, using observations and model experiments, that aerosols also intensify rainfall variability on two- to four-week timescales over South China primarily through cloud-microphysical processes, while radiative effects play a secondary role, thereby amplifying prolonged heavy rainfall events.