Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 24
Articles | Volume 25, issue 24
https://doi.org/10.5194/acp-25-18571-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-18571-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 24
Research article
 | 
19 Dec 2025
Research article |  | 19 Dec 2025

On the Weather Impact of Contrails: New Insights from Coupled ICON–CoCiP Simulations

Ulrich Schumann and Axel Seifert

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Short summary
Contrails caused by aircraft flying in cold and humid air masses, impact weather and climate. For reduction of the climate impact, one should avoid flights forming warming contrails. This requires good weather forecast of contrail formation conditions and contrail effects. We present a two-way coupling of the Contrail Cirrus Prediction model (CoCiP) with the global Icosahedral Non-hydrostatic numerical weather model (ICON). We find that contrails are predictable – but only for a finite period.
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