Heterogeneous grain growth and vertical mass transfer within a snow layer under a temperature gradient
Abstract - 1 using X-ray tomography and environmental sensors. The first experiment shows that snow evolves differently in the vertical: in the end, coarser depth hoar is found in the center part of the layer, with covariance lengths about 50 % higher compared to the top and bottom areas. We show that this heterogeneous grain growth could be related to the temperature profile, to the associated crystal growth regimes, and to the local vapor supersaturation. In the second experiment, a non-disturbing sampling method was applied to enable a precise observation of the basal mass transfer in the case of dry boundary conditions. An air gap, characterized by a sharp drop in density, developed at the base and reached more than 3 mm after a month. The two reported phenomena, heterogeneous grain growth and basal mass loss, create heterogeneities in snow – in terms of density, grain and pore size, and ice morphology – from an initial homogeneous layer. Finally, we report the formation of hard depth hoar associated with an increase in specific surface area (SSA) observed in the second experiment with higher initial density. These microscale effects may strongly impact the snowpack behavior, e.g., for snow transport processes or snow mechanics.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Heterogeneous grain growth and vertical mass transfer within a snow layer under a temperature gradient ; volume:17 ; number:8 ; year:2023 ; pages:3553-3573 ; extent:21
The Cryosphere ; 17, Heft 8 (2023), 3553-3573 (gesamt 21)
- Creator
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Bouvet, Lisa
Calonne, Neige
Flin, Frédéric
Geindreau, Christian
- DOI
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10.5194/tc-17-3553-2023
- URN
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urn:nbn:de:101:1-2023083104303544162075
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:46 AM CEST
Data provider
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Associated
- Bouvet, Lisa
- Calonne, Neige
- Flin, Frédéric
- Geindreau, Christian
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Orientation selective grain sublimation-deposition in snow under temperature gradient metamorphism observed with Diffraction Contrast Tomography
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