Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 20
Articles | Volume 26, issue 20
https://doi.org/10.5194/acp-26-14769-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-14769-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 20
Research article
 | 
20 Oct 2026
Research article |  | 20 Oct 2026

A new method to derive water vapor supersaturation at cumulus cloud base from in situ measurements

Ramon C. Braga, Manfred Wendisch, Rachel Albrecht, and Daniel Harrison

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Short summary
We introduce a new thermodynamic framework to derive water vapor supersaturation at warm cumulus cloud base from in situ measurements. The framework describes the local transition between saturated thermodynamic states as an adiabatic and reversible process under quasi-isobaric conditions, in which the latent energy released during condensation is partitioned between changes in internal energy and water-vapor expansion work.
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