A stacked mixing sequence at the base of the Dye 3 Core, Greenland
International audience This paper documents, by a detailed isotopic and gas composition study of the basal ice from the Dye 3 core, a large degree of flow‐induced mixing at the ice sheet base. This mixing results most probably from circular motion in troughs of bedrock undulations and flow separatio...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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1998
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Online Access: | https://hal.science/hal-03110386 https://hal.science/hal-03110386/document https://hal.science/hal-03110386/file/98GL01411.pdf https://doi.org/10.1029/98GL01411 |
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ftceafr:oai:HAL:hal-03110386v1 2024-09-15T18:04:07+00:00 A stacked mixing sequence at the base of the Dye 3 Core, Greenland Souchez, R. Bouzette, A. Clausen, H. Johnsen, S. Jouzel, J. Université libre de Bruxelles (ULB) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 1998 https://hal.science/hal-03110386 https://hal.science/hal-03110386/document https://hal.science/hal-03110386/file/98GL01411.pdf https://doi.org/10.1029/98GL01411 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/98GL01411 hal-03110386 https://hal.science/hal-03110386 https://hal.science/hal-03110386/document https://hal.science/hal-03110386/file/98GL01411.pdf doi:10.1029/98GL01411 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-03110386 Geophysical Research Letters, 1998, 25 (11), pp.1943-1946. ⟨10.1029/98GL01411⟩ [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 1998 ftceafr https://doi.org/10.1029/98GL01411 2024-07-22T13:16:39Z International audience This paper documents, by a detailed isotopic and gas composition study of the basal ice from the Dye 3 core, a large degree of flow‐induced mixing at the ice sheet base. This mixing results most probably from circular motion in troughs of bedrock undulations and flow separations with some entrainment of the underlying ice. The measured distribution of isotopes and gases in the basal ice is the consequence of successive mixing events having occurred upglacier from the site in an area of very rough bedrock topography. The deformation produced makes it possible for the basal part of the ice sheet to cross the subglacial valley existing in the Dye 3 area. Article in Journal/Newspaper Dye 3 Dye-3 Greenland Ice Sheet HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Geophysical Research Letters 25 11 1943 1946 |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Souchez, R. Bouzette, A. Clausen, H. Johnsen, S. Jouzel, J. A stacked mixing sequence at the base of the Dye 3 Core, Greenland |
topic_facet |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience This paper documents, by a detailed isotopic and gas composition study of the basal ice from the Dye 3 core, a large degree of flow‐induced mixing at the ice sheet base. This mixing results most probably from circular motion in troughs of bedrock undulations and flow separations with some entrainment of the underlying ice. The measured distribution of isotopes and gases in the basal ice is the consequence of successive mixing events having occurred upglacier from the site in an area of very rough bedrock topography. The deformation produced makes it possible for the basal part of the ice sheet to cross the subglacial valley existing in the Dye 3 area. |
author2 |
Université libre de Bruxelles (ULB) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
format |
Article in Journal/Newspaper |
author |
Souchez, R. Bouzette, A. Clausen, H. Johnsen, S. Jouzel, J. |
author_facet |
Souchez, R. Bouzette, A. Clausen, H. Johnsen, S. Jouzel, J. |
author_sort |
Souchez, R. |
title |
A stacked mixing sequence at the base of the Dye 3 Core, Greenland |
title_short |
A stacked mixing sequence at the base of the Dye 3 Core, Greenland |
title_full |
A stacked mixing sequence at the base of the Dye 3 Core, Greenland |
title_fullStr |
A stacked mixing sequence at the base of the Dye 3 Core, Greenland |
title_full_unstemmed |
A stacked mixing sequence at the base of the Dye 3 Core, Greenland |
title_sort |
stacked mixing sequence at the base of the dye 3 core, greenland |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.science/hal-03110386 https://hal.science/hal-03110386/document https://hal.science/hal-03110386/file/98GL01411.pdf https://doi.org/10.1029/98GL01411 |
genre |
Dye 3 Dye-3 Greenland Ice Sheet |
genre_facet |
Dye 3 Dye-3 Greenland Ice Sheet |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-03110386 Geophysical Research Letters, 1998, 25 (11), pp.1943-1946. ⟨10.1029/98GL01411⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/98GL01411 hal-03110386 https://hal.science/hal-03110386 https://hal.science/hal-03110386/document https://hal.science/hal-03110386/file/98GL01411.pdf doi:10.1029/98GL01411 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/98GL01411 |
container_title |
Geophysical Research Letters |
container_volume |
25 |
container_issue |
11 |
container_start_page |
1943 |
op_container_end_page |
1946 |
_version_ |
1810441614068285440 |