Articles | Volume 26, issue 3
https://doi.org/10.5194/acp-26-2293-2026
https://doi.org/10.5194/acp-26-2293-2026
Research article
 | 
13 Feb 2026
Research article |  | 13 Feb 2026

Remaining aerosol forcing uncertainty after observational constraint and the processes that cause it

Leighton A. Regayre, Léa M. C. Prévost, Kunal Ghosh, Jill S. Johnson, Jeremy E. Oakley, Jonathan Owen, Iain Webb, and Ken S. Carslaw

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Latest update: 07 May 2026
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Short summary
Tiny particles called aerosols affect how much sunlight the Earth reflects back into space – one of the biggest climate uncertainties. We use a large set of climate model simulations and find that uncertainty drops in some regions, but persists in other areas, after comparing models to observations. By identifying the specific processes that cause the remaining uncertainty, we guide future efforts to reduce the aerosol forcing uncertainty so we can make more reliable climate predictions.
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