Analysis of local ice crystal growth in snow
ABSTRACT The structural evolution of snow under metamorphism is one of the key challenges in snow modeling. The main driving forces for metamorphism are curvature differences and temperature gradients, inducing water vapor transport and corresponding crystal growth, which is detectable by the motion...
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Language: | English |
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Cambridge University Press (CUP)
2016
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Online Access: | http://dx.doi.org/10.1017/jog.2016.32 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016000320 |
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crcambridgeupr:10.1017/jog.2016.32 2024-05-12T08:06:15+00:00 Analysis of local ice crystal growth in snow KROL, QUIRINE LÖWE, HENNING 2016 http://dx.doi.org/10.1017/jog.2016.32 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016000320 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 62, issue 232, page 378-390 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2016 crcambridgeupr https://doi.org/10.1017/jog.2016.32 2024-04-18T06:53:48Z ABSTRACT The structural evolution of snow under metamorphism is one of the key challenges in snow modeling. The main driving forces for metamorphism are curvature differences and temperature gradients, inducing water vapor transport and corresponding crystal growth, which is detectable by the motion of the ice/air interface. To provide quantitative means for a microscopic validation of metamorphism models, a VTK-based image analysis method is developed to track the ice/air interface in time-lapse μ CT experiments to measure local interface velocities under both, isothermal and temperature gradient conditions. Using estimates of local temperatures from microstructure-based finite element simulations, a quantitative comparison of measured interface velocities with theoretical expressions is facilitated. For isothermal metamorphism, the data are compared with a kinetics and a diffusion limited growth law. In both cases the data are largely scattered but consistently show a mean curvature dependency of the interface velocity. For temperature gradient metamorphism, we confirm that the main contribution stems from the temperature gradient induced vapor flux, accompanied by effects of mean curvature as a secondary process. The scatter and uncertainties are discussed in view of the present theoretical understanding, the experimental setup and complications such as mechanical deformations. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 62 232 378 390 |
institution |
Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes KROL, QUIRINE LÖWE, HENNING Analysis of local ice crystal growth in snow |
topic_facet |
Earth-Surface Processes |
description |
ABSTRACT The structural evolution of snow under metamorphism is one of the key challenges in snow modeling. The main driving forces for metamorphism are curvature differences and temperature gradients, inducing water vapor transport and corresponding crystal growth, which is detectable by the motion of the ice/air interface. To provide quantitative means for a microscopic validation of metamorphism models, a VTK-based image analysis method is developed to track the ice/air interface in time-lapse μ CT experiments to measure local interface velocities under both, isothermal and temperature gradient conditions. Using estimates of local temperatures from microstructure-based finite element simulations, a quantitative comparison of measured interface velocities with theoretical expressions is facilitated. For isothermal metamorphism, the data are compared with a kinetics and a diffusion limited growth law. In both cases the data are largely scattered but consistently show a mean curvature dependency of the interface velocity. For temperature gradient metamorphism, we confirm that the main contribution stems from the temperature gradient induced vapor flux, accompanied by effects of mean curvature as a secondary process. The scatter and uncertainties are discussed in view of the present theoretical understanding, the experimental setup and complications such as mechanical deformations. |
format |
Article in Journal/Newspaper |
author |
KROL, QUIRINE LÖWE, HENNING |
author_facet |
KROL, QUIRINE LÖWE, HENNING |
author_sort |
KROL, QUIRINE |
title |
Analysis of local ice crystal growth in snow |
title_short |
Analysis of local ice crystal growth in snow |
title_full |
Analysis of local ice crystal growth in snow |
title_fullStr |
Analysis of local ice crystal growth in snow |
title_full_unstemmed |
Analysis of local ice crystal growth in snow |
title_sort |
analysis of local ice crystal growth in snow |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/jog.2016.32 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016000320 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 62, issue 232, page 378-390 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2016.32 |
container_title |
Journal of Glaciology |
container_volume |
62 |
container_issue |
232 |
container_start_page |
378 |
op_container_end_page |
390 |
_version_ |
1798848714341613568 |