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-26-13661-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-13661-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 19
Research article
 | 
30 Sep 2026
Research article |  | 30 Sep 2026

Isotopic fractionation during ice growth by riming and its effect on the d-excess of precipitation

Pradeep K. Aggarwal, Courtney Schumacher, Frederick J. Longstaffe, Aaron Funk, and Matthew D. Shupe

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Short summary
We show that in mixed-phase clouds, ice forming by riming, that is, freezing of supercooled liquid directly on ice particles, differs in its isotope composition than the liquid, contrary to the existing view in the literature. This isotopic change is the same for riming in tropical to polar precipitation. Our results provide a robust tool for cloud processes studies, for better understanding past climates from ice cores data, and for improving micro-physics schemes in climate models.
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