High sensitivity of simulated fog properties  to parameterized aerosol activation  in case studies from ParisFog

Ghosh, Pratapaditya; Boutle, Ian; Field, Paul; Hill, Adrian; Jones, Anthony; Mazoyer, Marie; Evans, Katherine J.; Mahajan, Salil; Kang, Hyun-Gyu; Xu, Min; Zhang, Wei; Asch, Noah; Gordon, Hamish

doi:10.5194/acp-25-11129-2025

Articles | Volume 25, issue 18

https://doi.org/10.5194/acp-25-11129-2025

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

https://doi.org/10.5194/acp-25-11129-2025

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

Articles | Volume 25, issue 18

Research article

|

24 Sep 2025

Research article |

| 24 Sep 2025

High sensitivity of simulated fog properties to parameterized aerosol activation in case studies from ParisFog

Pratapaditya Ghosh, Ian Boutle, Paul Field, Adrian Hill, Anthony Jones, Marie Mazoyer, Katherine J. Evans, Salil Mahajan, Hyun-Gyu Kang, Min Xu, Wei Zhang, Noah Asch, and Hamish Gordon

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Month	HTML	PDF	XML	Total
Dec 2024	266	50	12	328
Jan 2025	172	60	16	248
Feb 2025	174	32	6	212
Mar 2025	74	16	0	90
Apr 2025	68	14	2	84
May 2025	54	16	4	74
Jun 2025	138	22	12	172
Jul 2025	86	14	6	106
Aug 2025	374	20	0	394
Sep 2025	1,989	26	10	2,025
Oct 2025	284	51	7	342
Nov 2025	219	66	12	297
Dec 2025	232	100	10	342
Jan 2026	321	71	31	423
Feb 2026	263	113	17	393
Mar 2026	131	154	18	303
Apr 2026	115	138	16	269
May 2026	37	17	1	55

Cumulative views and downloads (calculated since 16 Dec 2024)

Month	HTML	PDF	XML	Total
Dec 2024	266	50	12	328
Jan 2025	172	60	16	248
Feb 2025	174	32	6	212
Mar 2025	74	16	0	90
Apr 2025	68	14	2	84
May 2025	54	16	4	74
Jun 2025	138	22	12	172
Jul 2025	86	14	6	106
Aug 2025	374	20	0	394
Sep 2025	1,989	26	10	2,025
Oct 2025	284	51	7	342
Nov 2025	219	66	12	297
Dec 2025	232	100	10	342
Jan 2026	321	71	31	423
Feb 2026	263	113	17	393
Mar 2026	131	154	18	303
Apr 2026	115	138	16	269
May 2026	37	17	1	55

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Total article views: 6,157 (including HTML, PDF, and XML) Thereof 6,157 with geography defined and 0 with unknown origin.

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Short summary

We study aerosol–fog interactions near Paris using a weather and climate model with high spatial resolution. We show that our model can simulate the fog life cycle effectively. We find that the fog droplet number concentrations, the amount of liquid water in the fog, and the vertical structure of the fog are highly sensitive to the parameterization that simulates droplet formation and growth. The changes we propose could improve fog forecasts significantly without increasing computational costs.