Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis
Abstract We analysed the three-dimensional microstructure of sea ice by means of X-ray-micro computed tomography. Microscopic (brine- and air- pore sizes, numbers and connectivity) and macroscopic (salinity, density, porosity) properties of young Arctic sea ice were analysed. The analysis is based o...
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Online Access: | http://dx.doi.org/10.1017/jog.2021.119 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021001192 |
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crcambridgeupr:10.1017/jog.2021.119 2024-03-03T08:42:06+00:00 Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis Salomon, Martina Lan Maus, Sönke Petrich, Chris Norges Forskningsråd 2021 http://dx.doi.org/10.1017/jog.2021.119 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021001192 en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 68, issue 269, page 571-590 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.119 2024-02-08T08:43:08Z Abstract We analysed the three-dimensional microstructure of sea ice by means of X-ray-micro computed tomography. Microscopic (brine- and air- pore sizes, numbers and connectivity) and macroscopic (salinity, density, porosity) properties of young Arctic sea ice were analysed. The analysis is based on ice cores obtained during spring 2016. Centrifuging of brine prior to CT imaging has allowed us to derive confident relationships between the open, vertically connected and total porosity of young sea ice at relatively high temperatures. We analysed the dependence of the microscopic properties on vertical position and total brine porosity. Most bulk properties (salinity, density) and pore space properties (pore sizes and their distribution) show a strong dependence on total brine porosity, but did not change significantly over the course of the field work. However, significant changes were observed for pore numbers (decreasing over time) and pore connectivity (increasing over time). CT-based salinity determinations are subject to larger than standard uncertainties (from conductivity), while the CT method yields important information about the salinity contributions from closed and open pores. We also performed a comparison of CT-based air porosity with calculations based on density from hydrostatic weighing. The consistency is encouraging and gives confidence to our CT-based results. Article in Journal/Newspaper Arctic Journal of Glaciology Sea ice Svalbard Cambridge University Press Arctic Svalbard Journal of Glaciology 1 20 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Salomon, Martina Lan Maus, Sönke Petrich, Chris Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis |
topic_facet |
Earth-Surface Processes |
description |
Abstract We analysed the three-dimensional microstructure of sea ice by means of X-ray-micro computed tomography. Microscopic (brine- and air- pore sizes, numbers and connectivity) and macroscopic (salinity, density, porosity) properties of young Arctic sea ice were analysed. The analysis is based on ice cores obtained during spring 2016. Centrifuging of brine prior to CT imaging has allowed us to derive confident relationships between the open, vertically connected and total porosity of young sea ice at relatively high temperatures. We analysed the dependence of the microscopic properties on vertical position and total brine porosity. Most bulk properties (salinity, density) and pore space properties (pore sizes and their distribution) show a strong dependence on total brine porosity, but did not change significantly over the course of the field work. However, significant changes were observed for pore numbers (decreasing over time) and pore connectivity (increasing over time). CT-based salinity determinations are subject to larger than standard uncertainties (from conductivity), while the CT method yields important information about the salinity contributions from closed and open pores. We also performed a comparison of CT-based air porosity with calculations based on density from hydrostatic weighing. The consistency is encouraging and gives confidence to our CT-based results. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Salomon, Martina Lan Maus, Sönke Petrich, Chris |
author_facet |
Salomon, Martina Lan Maus, Sönke Petrich, Chris |
author_sort |
Salomon, Martina Lan |
title |
Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis |
title_short |
Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis |
title_full |
Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis |
title_fullStr |
Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis |
title_full_unstemmed |
Microstructure evolution of young sea ice from a Svalbard fjord using micro-CT analysis |
title_sort |
microstructure evolution of young sea ice from a svalbard fjord using micro-ct analysis |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.119 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021001192 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Journal of Glaciology Sea ice Svalbard |
genre_facet |
Arctic Journal of Glaciology Sea ice Svalbard |
op_source |
Journal of Glaciology volume 68, issue 269, page 571-590 ISSN 0022-1430 1727-5652 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2021.119 |
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Journal of Glaciology |
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1 |
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20 |
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1792497595837317120 |