Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography
In this study on temperature gradient metamorphism in snow, we investigate the hypothesis that there exists a favourable crystalline orientation relative to the temperature gradient, giving rise to a faster formation of crystallographic facets. We applied in situ time-lapse diffraction contrast tomo...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058122 2023-05-15T18:32:32+02:00 Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography Granger, Rémi Flin, Frédéric Ludwig, Wolfgang Hammad, Ismail Geindreau, Christian 2021-09 electronic https://doi.org/10.5194/tc-15-4381-2021 https://noa.gwlb.de/receive/cop_mods_00058122 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057772/tc-15-4381-2021.pdf https://tc.copernicus.org/articles/15/4381/2021/tc-15-4381-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-4381-2021 https://noa.gwlb.de/receive/cop_mods_00058122 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057772/tc-15-4381-2021.pdf https://tc.copernicus.org/articles/15/4381/2021/tc-15-4381-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-4381-2021 2022-02-08T22:33:15Z In this study on temperature gradient metamorphism in snow, we investigate the hypothesis that there exists a favourable crystalline orientation relative to the temperature gradient, giving rise to a faster formation of crystallographic facets. We applied in situ time-lapse diffraction contrast tomography on a snow sample with a density of 476 kg m−3 subject to a temperature gradient of 52 ∘Cm-1 at mean temperatures in the range between −4.1 and −2.1 ∘C for 3 d. The orientations of about 900 grains along with their microstructural evolution are followed over time. Faceted crystals appear during the evolution, and from the analysis of the material fluxes, we observe higher sublimation–deposition rates for grains with their c axis in the horizontal plane at the beginning of the metamorphism. This remains the case up to the end of the experiment for what concerns sublimation while the differences vanish for deposition. The latter observation is explained in terms of geometrical interactions between grains. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 15 9 4381 4398 |
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article Verlagsveröffentlichung Granger, Rémi Flin, Frédéric Ludwig, Wolfgang Hammad, Ismail Geindreau, Christian Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
topic_facet |
article Verlagsveröffentlichung |
description |
In this study on temperature gradient metamorphism in snow, we investigate the hypothesis that there exists a favourable crystalline orientation relative to the temperature gradient, giving rise to a faster formation of crystallographic facets. We applied in situ time-lapse diffraction contrast tomography on a snow sample with a density of 476 kg m−3 subject to a temperature gradient of 52 ∘Cm-1 at mean temperatures in the range between −4.1 and −2.1 ∘C for 3 d. The orientations of about 900 grains along with their microstructural evolution are followed over time. Faceted crystals appear during the evolution, and from the analysis of the material fluxes, we observe higher sublimation–deposition rates for grains with their c axis in the horizontal plane at the beginning of the metamorphism. This remains the case up to the end of the experiment for what concerns sublimation while the differences vanish for deposition. The latter observation is explained in terms of geometrical interactions between grains. |
format |
Article in Journal/Newspaper |
author |
Granger, Rémi Flin, Frédéric Ludwig, Wolfgang Hammad, Ismail Geindreau, Christian |
author_facet |
Granger, Rémi Flin, Frédéric Ludwig, Wolfgang Hammad, Ismail Geindreau, Christian |
author_sort |
Granger, Rémi |
title |
Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
title_short |
Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
title_full |
Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
title_fullStr |
Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
title_full_unstemmed |
Orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
title_sort |
orientation selective grain sublimation–deposition in snow under temperature gradient metamorphism observed with diffraction contrast tomography |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-4381-2021 https://noa.gwlb.de/receive/cop_mods_00058122 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057772/tc-15-4381-2021.pdf https://tc.copernicus.org/articles/15/4381/2021/tc-15-4381-2021.pdf |
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The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-4381-2021 https://noa.gwlb.de/receive/cop_mods_00058122 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057772/tc-15-4381-2021.pdf https://tc.copernicus.org/articles/15/4381/2021/tc-15-4381-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-15-4381-2021 |
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The Cryosphere |
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15 |
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9 |
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4381 |
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4398 |
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