Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range
International audience Modeling air transport through the entire firn column of polar ice sheets is needed to interpret climate archives. To this end, different regressions have been proposed in the past to estimate the effective coefficient of diffusion and permeability of firn. These regressions a...
Published in: | The Cryosphere |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://insu.hal.science/insu-03668389 https://insu.hal.science/insu-03668389/document https://insu.hal.science/insu-03668389/file/tc-16-967-2022.pdf https://doi.org/10.5194/tc-16-967-2022 |
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ftutoulouse3hal:oai:HAL:insu-03668389v1 |
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Open Polar |
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Université Toulouse III - Paul Sabatier: HAL-UPS |
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ftutoulouse3hal |
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English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Calonne, Neige Burr, Alexis Philip, Armelle Flin, Frédéric Geindreau, Christian Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Modeling air transport through the entire firn column of polar ice sheets is needed to interpret climate archives. To this end, different regressions have been proposed in the past to estimate the effective coefficient of diffusion and permeability of firn. These regressions are often valid for specific depth or porosity ranges only. Also, they constitute a source of uncertainty as evaluations have been limited by the lack of reliable data of firn transport properties. To contribute with a new dataset, this study presents the effective coefficient of diffusion and the permeability at Dome C and Lock In, Antarctica, from the near-surface to the close-off (23 to 133 m depth). Also, microstructure is characterized based on density, specific surface area, closed porosity ratio, connectivity index, and structural anisotropy through the correlation lengths. All properties were estimated based on pore-scale computations from 3D tomographic images of firn samples. The normalized diffusion coefficient ranges from 1.9 × 10 −1 to 8.3 × 10 −5 , and permeability ranges from 1.2 × 10 −9 to 1.1 × 10 −12 m 2 , for densities between 565 and 888 kg m −3 . No or little anisotropy is reported. Next, we investigate the relationship of the transport properties with density over the firn density range (550-850 kg m −3 ), as well as over the entire density range encountered in the ice sheets (100-850 kg m −3 ), by extending the datasets with transport properties of alpine and artificial snow from previous studies. Classical analytical models and regressions from literature are evaluated against the estimates from pore-scale simulations. For firn, good agreements are found for permeability and the diffusion coefficient with two existing regressions of the literature based on open porosity despite the rather different site conditions (Greenland). Over the entire 100-850 kg m −3 density range, permeability is accurately reproduced by the Carman-Kozeny and self-consistent (spherical bi-composite) models when ... |
author2 |
Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Laboratoire sols, solides, structures - risques Grenoble (3SR) Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) ANR-10-LABX-0056,OSUG@2020,Innovative strategies for observing and modelling natural systems(2010) ANR-11-LABX-0030,TEC XXI,Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè(2011) |
format |
Article in Journal/Newspaper |
author |
Calonne, Neige Burr, Alexis Philip, Armelle Flin, Frédéric Geindreau, Christian |
author_facet |
Calonne, Neige Burr, Alexis Philip, Armelle Flin, Frédéric Geindreau, Christian |
author_sort |
Calonne, Neige |
title |
Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
title_short |
Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
title_full |
Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
title_fullStr |
Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
title_full_unstemmed |
Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
title_sort |
effective coefficient of diffusion and permeability of firn at dome c and lock in, antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03668389 https://insu.hal.science/insu-03668389/document https://insu.hal.science/insu-03668389/file/tc-16-967-2022.pdf https://doi.org/10.5194/tc-16-967-2022 |
genre |
Antarc* Antarctica Greenland The Cryosphere |
genre_facet |
Antarc* Antarctica Greenland The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03668389 The Cryosphere, 2022, 16, pp.967-980. ⟨10.5194/tc-16-967-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-967-2022 insu-03668389 https://insu.hal.science/insu-03668389 https://insu.hal.science/insu-03668389/document https://insu.hal.science/insu-03668389/file/tc-16-967-2022.pdf BIBCODE: 2022TCry.16.967C doi:10.5194/tc-16-967-2022 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-16-967-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
3 |
container_start_page |
967 |
op_container_end_page |
980 |
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1810492798902730752 |
spelling |
ftutoulouse3hal:oai:HAL:insu-03668389v1 2024-09-15T17:45:05+00:00 Effective coefficient of diffusion and permeability of firn at Dome C and Lock In, Antarctica, and of various snow types - estimates over the 100-850 kg m −3 density range Calonne, Neige Burr, Alexis Philip, Armelle Flin, Frédéric Geindreau, Christian Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Laboratoire sols, solides, structures - risques Grenoble (3SR) Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) ANR-10-LABX-0056,OSUG@2020,Innovative strategies for observing and modelling natural systems(2010) ANR-11-LABX-0030,TEC XXI,Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè(2011) 2022 https://insu.hal.science/insu-03668389 https://insu.hal.science/insu-03668389/document https://insu.hal.science/insu-03668389/file/tc-16-967-2022.pdf https://doi.org/10.5194/tc-16-967-2022 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-967-2022 insu-03668389 https://insu.hal.science/insu-03668389 https://insu.hal.science/insu-03668389/document https://insu.hal.science/insu-03668389/file/tc-16-967-2022.pdf BIBCODE: 2022TCry.16.967C doi:10.5194/tc-16-967-2022 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03668389 The Cryosphere, 2022, 16, pp.967-980. ⟨10.5194/tc-16-967-2022⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftutoulouse3hal https://doi.org/10.5194/tc-16-967-2022 2024-06-25T00:09:42Z International audience Modeling air transport through the entire firn column of polar ice sheets is needed to interpret climate archives. To this end, different regressions have been proposed in the past to estimate the effective coefficient of diffusion and permeability of firn. These regressions are often valid for specific depth or porosity ranges only. Also, they constitute a source of uncertainty as evaluations have been limited by the lack of reliable data of firn transport properties. To contribute with a new dataset, this study presents the effective coefficient of diffusion and the permeability at Dome C and Lock In, Antarctica, from the near-surface to the close-off (23 to 133 m depth). Also, microstructure is characterized based on density, specific surface area, closed porosity ratio, connectivity index, and structural anisotropy through the correlation lengths. All properties were estimated based on pore-scale computations from 3D tomographic images of firn samples. The normalized diffusion coefficient ranges from 1.9 × 10 −1 to 8.3 × 10 −5 , and permeability ranges from 1.2 × 10 −9 to 1.1 × 10 −12 m 2 , for densities between 565 and 888 kg m −3 . No or little anisotropy is reported. Next, we investigate the relationship of the transport properties with density over the firn density range (550-850 kg m −3 ), as well as over the entire density range encountered in the ice sheets (100-850 kg m −3 ), by extending the datasets with transport properties of alpine and artificial snow from previous studies. Classical analytical models and regressions from literature are evaluated against the estimates from pore-scale simulations. For firn, good agreements are found for permeability and the diffusion coefficient with two existing regressions of the literature based on open porosity despite the rather different site conditions (Greenland). Over the entire 100-850 kg m −3 density range, permeability is accurately reproduced by the Carman-Kozeny and self-consistent (spherical bi-composite) models when ... Article in Journal/Newspaper Antarc* Antarctica Greenland The Cryosphere Université Toulouse III - Paul Sabatier: HAL-UPS The Cryosphere 16 3 967 980 |