The Cryosphere
The Cryosphere
TC
Articles | Volume 19, issue 12
Articles | Volume 19, issue 12
https://doi.org/10.5194/tc-19-6791-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-19-6791-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 12
Research article
 | 
16 Dec 2025
Research article |  | 16 Dec 2025

Kinetic grain growth in firn induced by meltwater infiltration on the Greenland Ice Sheet

Kirsten L. Gehl, Joel T. Harper, and Neil F. Humphrey

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Short summary
The geometric form of snow grains governs snow compaction and the movement of air and water within the snow. We observed unexpectedly thick and deep layers of faceted snow grains in cores drilled along the flanks of the Greenland Ice Sheet. Based on field measurements and modeling, we find that meltwater infiltration and refreezing in the cold snow generates these grains. As more of the ice sheet is affected by melting, subsurface faceting of snow crystals may become increasingly important.
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