Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 19
Articles | Volume 26, issue 19
https://doi.org/10.5194/acp-26-14111-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-14111-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 19
Research article
 | 
09 Oct 2026
Research article |  | 09 Oct 2026

Estimating Twomey forcing sensitivity to aerosol plume spreading rates

Lucas A. McMichael, Ehsan Erfani, Robert Wood, and Knut von Salzen

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Short summary
This study explores how aerosol plumes spread in marine clouds and how that affects cloud brightening. Changes in turbulence strongly affect plume spreading rates, but have little effect on the overall brightening in the cases studied. The main uncertainties are aerosol lifetime and how clouds adjust to the aerosols. Climate models often assume that plumes spread instantly, and we find that this may overestimate cooling in some cases.
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