Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction
ABSTRACT The instrumented sample holder Snowbreeder 5 is used to investigate the simultaneous influence of settlement on temperature-gradient snow metamorphism in time-lapse micro-computed tomography experiments. So far, experiments have only been done on temperature-gradient snow metamorphism witho...
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Language: | English |
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Cambridge University Press (CUP)
2017
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Online Access: | http://dx.doi.org/10.1017/jog.2016.143 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301600143X |
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crcambridgeupr:10.1017/jog.2016.143 2024-05-12T08:06:15+00:00 Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction WIESE, MAREIKE SCHNEEBELI, MARTIN 2017 http://dx.doi.org/10.1017/jog.2016.143 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301600143X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 63, issue 238, page 355-360 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2017 crcambridgeupr https://doi.org/10.1017/jog.2016.143 2024-04-18T06:54:11Z ABSTRACT The instrumented sample holder Snowbreeder 5 is used to investigate the simultaneous influence of settlement on temperature-gradient snow metamorphism in time-lapse micro-computed tomography experiments. So far, experiments have only been done on temperature-gradient snow metamorphism without settlement or settlement under isothermal conditions. With the new device we can impose a constant temperature gradient on a snow sample and induce settlement by placing a passive load on top of the snow sample. The weight of the load can be varied, simulating various snow heights on top of the snow sample. Snow-temperature measurements on the passive load are possible due to wireless data transfer via Bluetooth. The temperature gradient is set by controlling the air temperature inside the computer tomograph and by a Peltier element at the bottom of the snow sample. First experiments under isothermal conditions and a constant temperature gradient of 43 K m −1 showed that the settlement was reduced to almost half as soon as a temperature gradient was applied under otherwise almost equal snow conditions. The compactive viscosity in the isothermal experiment was in the range of literature values. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Peltier ENVELOPE(-63.495,-63.495,-64.854,-64.854) Journal of Glaciology 63 238 355 360 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes WIESE, MAREIKE SCHNEEBELI, MARTIN Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
topic_facet |
Earth-Surface Processes |
description |
ABSTRACT The instrumented sample holder Snowbreeder 5 is used to investigate the simultaneous influence of settlement on temperature-gradient snow metamorphism in time-lapse micro-computed tomography experiments. So far, experiments have only been done on temperature-gradient snow metamorphism without settlement or settlement under isothermal conditions. With the new device we can impose a constant temperature gradient on a snow sample and induce settlement by placing a passive load on top of the snow sample. The weight of the load can be varied, simulating various snow heights on top of the snow sample. Snow-temperature measurements on the passive load are possible due to wireless data transfer via Bluetooth. The temperature gradient is set by controlling the air temperature inside the computer tomograph and by a Peltier element at the bottom of the snow sample. First experiments under isothermal conditions and a constant temperature gradient of 43 K m −1 showed that the settlement was reduced to almost half as soon as a temperature gradient was applied under otherwise almost equal snow conditions. The compactive viscosity in the isothermal experiment was in the range of literature values. |
format |
Article in Journal/Newspaper |
author |
WIESE, MAREIKE SCHNEEBELI, MARTIN |
author_facet |
WIESE, MAREIKE SCHNEEBELI, MARTIN |
author_sort |
WIESE, MAREIKE |
title |
Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
title_short |
Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
title_full |
Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
title_fullStr |
Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
title_full_unstemmed |
Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
title_sort |
snowbreeder 5: a micro-ct device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction |
publisher |
Cambridge University Press (CUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1017/jog.2016.143 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301600143X |
long_lat |
ENVELOPE(-63.495,-63.495,-64.854,-64.854) |
geographic |
Peltier |
geographic_facet |
Peltier |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 63, issue 238, page 355-360 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2016.143 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
238 |
container_start_page |
355 |
op_container_end_page |
360 |
_version_ |
1798848714143432704 |