On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack
International audience The role of near-surface snow processes for the formation of climate signals through densification into deep polar firn is still barely understood. To this end we have analyzed a shallow snow pit (0-3 meters) from EastGRIP (Greenland) and derived high-resolution profiles of di...
Published in: | Frontiers in Earth Science |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-03024371 https://hal.science/hal-03024371/document https://hal.science/hal-03024371/file/Montagnat2020_EastGRIPSnowPackAnisotropy.pdf https://doi.org/10.3389/feart.2020.00365 |
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ftutoulouse3hal:oai:HAL:hal-03024371v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
English |
topic |
snow cover structural fabric crystallographic fabric seasonal signal metamorphism densification Greenland [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
snow cover structural fabric crystallographic fabric seasonal signal metamorphism densification Greenland [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Montagnat, Maurine Löwe, Henning Calonne, Neige Schneebeli, Martin Matzl, Margret Jaggi, Matthias On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack |
topic_facet |
snow cover structural fabric crystallographic fabric seasonal signal metamorphism densification Greenland [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience The role of near-surface snow processes for the formation of climate signals through densification into deep polar firn is still barely understood. To this end we have analyzed a shallow snow pit (0-3 meters) from EastGRIP (Greenland) and derived high-resolution profiles of different types of mechanically relevant fabric tensors. The structural fabric, which characterizes the anisotropic geometry of ice matrix and pore space, was obtained by X-ray tomography. The crystallographic fabric, which characterizes the anisotropic distribution of the c-axis (or optical axis) orientations of snow crystals, was obtained from automatic analysis of thin sections. The structural fabric profile unambiguously reveals the seasonal cycles at EastGRIP, as a consequence of temperature gradient metamorphism, and in contrast to featureless signals of parameters like density or specific surface area. The crystallographic fabric profile unambiguously reveals a signal of cluster-type texture already at shallow depth. We make use of order of magnitude estimates for the formation time of both fabric signals and discuss potential coupling effects in the context of snow and firn densification. |
author2 |
Centre National de la Recherche Scientifique (CNRS) Université Grenoble Alpes (UGA) 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 ) Centre d'Etudes de la Neige (CEN) 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 national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) 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)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA) 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) Swiss Federal Institute for Forest, Snow and Landscape Research WSL SLF Institut pour l'étude de la neige et des avalanches (SLF) SLF Météo-France Direction Interrégionale Sud-Est (DIRSE) Météo-France |
format |
Article in Journal/Newspaper |
author |
Montagnat, Maurine Löwe, Henning Calonne, Neige Schneebeli, Martin Matzl, Margret Jaggi, Matthias |
author_facet |
Montagnat, Maurine Löwe, Henning Calonne, Neige Schneebeli, Martin Matzl, Margret Jaggi, Matthias |
author_sort |
Montagnat, Maurine |
title |
On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack |
title_short |
On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack |
title_full |
On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack |
title_fullStr |
On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack |
title_full_unstemmed |
On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack |
title_sort |
on the birth of structural and crystallographic fabric signals in polar snow: a case study from the eastgrip snowpack |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03024371 https://hal.science/hal-03024371/document https://hal.science/hal-03024371/file/Montagnat2020_EastGRIPSnowPackAnisotropy.pdf https://doi.org/10.3389/feart.2020.00365 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
ISSN: 2296-6463 Frontiers in Earth Science https://hal.science/hal-03024371 Frontiers in Earth Science, 2020, ⟨10.3389/feart.2020.00365⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2020.00365 hal-03024371 https://hal.science/hal-03024371 https://hal.science/hal-03024371/document https://hal.science/hal-03024371/file/Montagnat2020_EastGRIPSnowPackAnisotropy.pdf doi:10.3389/feart.2020.00365 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/feart.2020.00365 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
_version_ |
1802644865673068544 |
spelling |
ftutoulouse3hal:oai:HAL:hal-03024371v1 2024-06-23T07:53:17+00:00 On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack Montagnat, Maurine Löwe, Henning Calonne, Neige Schneebeli, Martin Matzl, Margret Jaggi, Matthias Centre National de la Recherche Scientifique (CNRS) Université Grenoble Alpes (UGA) 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 ) Centre d'Etudes de la Neige (CEN) 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 national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) 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)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA) 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) Swiss Federal Institute for Forest, Snow and Landscape Research WSL SLF Institut pour l'étude de la neige et des avalanches (SLF) SLF Météo-France Direction Interrégionale Sud-Est (DIRSE) Météo-France 2020-09-16 https://hal.science/hal-03024371 https://hal.science/hal-03024371/document https://hal.science/hal-03024371/file/Montagnat2020_EastGRIPSnowPackAnisotropy.pdf https://doi.org/10.3389/feart.2020.00365 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2020.00365 hal-03024371 https://hal.science/hal-03024371 https://hal.science/hal-03024371/document https://hal.science/hal-03024371/file/Montagnat2020_EastGRIPSnowPackAnisotropy.pdf doi:10.3389/feart.2020.00365 info:eu-repo/semantics/OpenAccess ISSN: 2296-6463 Frontiers in Earth Science https://hal.science/hal-03024371 Frontiers in Earth Science, 2020, ⟨10.3389/feart.2020.00365⟩ snow cover structural fabric crystallographic fabric seasonal signal metamorphism densification Greenland [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2020 ftutoulouse3hal https://doi.org/10.3389/feart.2020.00365 2024-06-04T00:02:50Z International audience The role of near-surface snow processes for the formation of climate signals through densification into deep polar firn is still barely understood. To this end we have analyzed a shallow snow pit (0-3 meters) from EastGRIP (Greenland) and derived high-resolution profiles of different types of mechanically relevant fabric tensors. The structural fabric, which characterizes the anisotropic geometry of ice matrix and pore space, was obtained by X-ray tomography. The crystallographic fabric, which characterizes the anisotropic distribution of the c-axis (or optical axis) orientations of snow crystals, was obtained from automatic analysis of thin sections. The structural fabric profile unambiguously reveals the seasonal cycles at EastGRIP, as a consequence of temperature gradient metamorphism, and in contrast to featureless signals of parameters like density or specific surface area. The crystallographic fabric profile unambiguously reveals a signal of cluster-type texture already at shallow depth. We make use of order of magnitude estimates for the formation time of both fabric signals and discuss potential coupling effects in the context of snow and firn densification. Article in Journal/Newspaper Greenland Université Toulouse III - Paul Sabatier: HAL-UPS Greenland Frontiers in Earth Science 8 |