Imaging air volume fraction in sea ice using non-destructive X-ray tomography
Although the presence of a gas phase in sea ice creates the potential for gas exchange with the atmosphere, the distribution of gas bubbles and transport of gases within the sea ice are still poorly understood. Currently no straightforward technique exists to measure the vertical distribution of air...
Published in: | The Cryosphere |
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Online Access: | https://doi.org/10.5194/tc-10-1125-2016 http://www.the-cryosphere.net/10/1125/2016/tc-10-1125-2016.pdf https://doaj.org/article/e962a857b96d496c95c06a9de9b17744 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:e962a857b96d496c95c06a9de9b17744 2023-05-15T18:16:39+02:00 Imaging air volume fraction in sea ice using non-destructive X-ray tomography O. Crabeck R. Galley B. Delille B. Else N.-X. Geilfus M. Lemes M. Des Roches P. Francus J.-L. Tison S. Rysgaard 2016-05-01 https://doi.org/10.5194/tc-10-1125-2016 http://www.the-cryosphere.net/10/1125/2016/tc-10-1125-2016.pdf https://doaj.org/article/e962a857b96d496c95c06a9de9b17744 en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-10-1125-2016 http://www.the-cryosphere.net/10/1125/2016/tc-10-1125-2016.pdf https://doaj.org/article/e962a857b96d496c95c06a9de9b17744 undefined The Cryosphere, Vol 10, Iss 3, Pp 1125-1145 (2016) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.5194/tc-10-1125-2016 2023-01-22T18:03:53Z Although the presence of a gas phase in sea ice creates the potential for gas exchange with the atmosphere, the distribution of gas bubbles and transport of gases within the sea ice are still poorly understood. Currently no straightforward technique exists to measure the vertical distribution of air volume fraction in sea ice. Here, we present a new fast and non-destructive X-ray computed tomography technique to quantify the air volume fraction and produce separate images of air volume inclusions in sea ice. The technique was performed on relatively thin (4–22 cm) sea ice collected from an experimental ice tank. While most of the internal layers showed air volume fractions < 2 %, the ice–air interface (top 2 cm) systematically showed values up to 5 %. We suggest that the air volume fraction is a function of both the bulk ice gas saturation factor and the brine volume fraction. We differentiate micro bubbles (Ø < 1 mm), large bubbles (1 mm 5 mm). While micro bubbles were the most abundant type of gas bubbles, most of the air porosity observed resulted from the presence of large and macro bubbles. The ice texture (granular and columnar) as well as the permeability state of ice are important factors controlling the air volume fraction. The technique developed is suited for studies related to gas transport and bubble migration. Article in Journal/Newspaper Sea ice The Cryosphere Unknown The Cryosphere 10 3 1125 1145 |
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English |
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geo envir O. Crabeck R. Galley B. Delille B. Else N.-X. Geilfus M. Lemes M. Des Roches P. Francus J.-L. Tison S. Rysgaard Imaging air volume fraction in sea ice using non-destructive X-ray tomography |
topic_facet |
geo envir |
description |
Although the presence of a gas phase in sea ice creates the potential for gas exchange with the atmosphere, the distribution of gas bubbles and transport of gases within the sea ice are still poorly understood. Currently no straightforward technique exists to measure the vertical distribution of air volume fraction in sea ice. Here, we present a new fast and non-destructive X-ray computed tomography technique to quantify the air volume fraction and produce separate images of air volume inclusions in sea ice. The technique was performed on relatively thin (4–22 cm) sea ice collected from an experimental ice tank. While most of the internal layers showed air volume fractions < 2 %, the ice–air interface (top 2 cm) systematically showed values up to 5 %. We suggest that the air volume fraction is a function of both the bulk ice gas saturation factor and the brine volume fraction. We differentiate micro bubbles (Ø < 1 mm), large bubbles (1 mm 5 mm). While micro bubbles were the most abundant type of gas bubbles, most of the air porosity observed resulted from the presence of large and macro bubbles. The ice texture (granular and columnar) as well as the permeability state of ice are important factors controlling the air volume fraction. The technique developed is suited for studies related to gas transport and bubble migration. |
format |
Article in Journal/Newspaper |
author |
O. Crabeck R. Galley B. Delille B. Else N.-X. Geilfus M. Lemes M. Des Roches P. Francus J.-L. Tison S. Rysgaard |
author_facet |
O. Crabeck R. Galley B. Delille B. Else N.-X. Geilfus M. Lemes M. Des Roches P. Francus J.-L. Tison S. Rysgaard |
author_sort |
O. Crabeck |
title |
Imaging air volume fraction in sea ice using non-destructive X-ray tomography |
title_short |
Imaging air volume fraction in sea ice using non-destructive X-ray tomography |
title_full |
Imaging air volume fraction in sea ice using non-destructive X-ray tomography |
title_fullStr |
Imaging air volume fraction in sea ice using non-destructive X-ray tomography |
title_full_unstemmed |
Imaging air volume fraction in sea ice using non-destructive X-ray tomography |
title_sort |
imaging air volume fraction in sea ice using non-destructive x-ray tomography |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-1125-2016 http://www.the-cryosphere.net/10/1125/2016/tc-10-1125-2016.pdf https://doaj.org/article/e962a857b96d496c95c06a9de9b17744 |
genre |
Sea ice The Cryosphere |
genre_facet |
Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 10, Iss 3, Pp 1125-1145 (2016) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-10-1125-2016 http://www.the-cryosphere.net/10/1125/2016/tc-10-1125-2016.pdf https://doaj.org/article/e962a857b96d496c95c06a9de9b17744 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-10-1125-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
3 |
container_start_page |
1125 |
op_container_end_page |
1145 |
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1766190428709715968 |