Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes
International audience The disturbed stratigraphy of the ice in the lowest 10% of the Greenland GRIP ice core has been previously demonstrated using gas measurements (d 18 O of O 2 and CH 4) on a few meters depth scale. However, rapid ice isotopic variations (on the scale of 20 cm) are experienced i...
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Online Access: | https://hal.science/hal-03103789 https://hal.science/hal-03103789/document https://hal.science/hal-03103789/file/2003JD004193.pdf https://doi.org/10.1029/2003JD004193 |
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ftinsu:oai:HAL:hal-03103789v1 2024-04-28T08:21:30+00:00 Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes Landais, Amaelle Steffensen, Jørgen Peder Caillon, Nicolas Jouzel, Jean Masson-Delmotte, Valérie Schwander, Jakob 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) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) 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)) University of Copenhagen = Københavns Universitet (UCPH) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) 2004-03-27 https://hal.science/hal-03103789 https://hal.science/hal-03103789/document https://hal.science/hal-03103789/file/2003JD004193.pdf https://doi.org/10.1029/2003JD004193 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2003JD004193 hal-03103789 https://hal.science/hal-03103789 https://hal.science/hal-03103789/document https://hal.science/hal-03103789/file/2003JD004193.pdf doi:10.1029/2003JD004193 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03103789 Journal of Geophysical Research: Atmospheres, 2004, 109 (D6), pp.n/a-n/a. ⟨10.1029/2003JD004193⟩ 1827 Hydrology: Glaciology (1863) 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology 3349 Meteorology and Atmospheric Dynamics: Polar meteorology ice core rapid climatic change air isotopic composition [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2004 ftinsu https://doi.org/10.1029/2003JD004193 2024-04-05T00:39:09Z International audience The disturbed stratigraphy of the ice in the lowest 10% of the Greenland GRIP ice core has been previously demonstrated using gas measurements (d 18 O of O 2 and CH 4) on a few meters depth scale. However, rapid ice isotopic variations (on the scale of 20 cm) are experienced in the bottom of the GRIP ice core with complex chemical signatures that make them difficult to reconcile with a disturbed stratigraphy of the ice. This is the case for event 5e1, first described as a dramatic cooling 120 kyr BP. We analyzed at a 5 cm resolution the isotopic composition of the air from 2 m of the GRIP bottom ice core covering event 5e1. The d 15 N measurements, combined with a basic firn modeling, lead to the solid conclusion that the rapid event 5e1 is not a climatic event. Rapid variations of d 18 O of O 2 (d 18 O atm) are in agreement with a disturbed ice stratigraphy. However, the double peak shape of the d 18 O atm , recalling chemical data at the same depth, requires processes of diffusion after the mixing or even postcoring, placing limits to the interpretation of some classical paleoclimatic proxies in small scale mixed ice (<1 m). Article in Journal/Newspaper Greenland Greenland ice core Greenland Ice core Project GRIP ice core Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Atmospheres 109 D6 n/a n/a |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
1827 Hydrology: Glaciology (1863) 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology 3349 Meteorology and Atmospheric Dynamics: Polar meteorology ice core rapid climatic change air isotopic composition [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
1827 Hydrology: Glaciology (1863) 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology 3349 Meteorology and Atmospheric Dynamics: Polar meteorology ice core rapid climatic change air isotopic composition [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Landais, Amaelle Steffensen, Jørgen Peder Caillon, Nicolas Jouzel, Jean Masson-Delmotte, Valérie Schwander, Jakob Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes |
topic_facet |
1827 Hydrology: Glaciology (1863) 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology 3349 Meteorology and Atmospheric Dynamics: Polar meteorology ice core rapid climatic change air isotopic composition [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The disturbed stratigraphy of the ice in the lowest 10% of the Greenland GRIP ice core has been previously demonstrated using gas measurements (d 18 O of O 2 and CH 4) on a few meters depth scale. However, rapid ice isotopic variations (on the scale of 20 cm) are experienced in the bottom of the GRIP ice core with complex chemical signatures that make them difficult to reconcile with a disturbed stratigraphy of the ice. This is the case for event 5e1, first described as a dramatic cooling 120 kyr BP. We analyzed at a 5 cm resolution the isotopic composition of the air from 2 m of the GRIP bottom ice core covering event 5e1. The d 15 N measurements, combined with a basic firn modeling, lead to the solid conclusion that the rapid event 5e1 is not a climatic event. Rapid variations of d 18 O of O 2 (d 18 O atm) are in agreement with a disturbed ice stratigraphy. However, the double peak shape of the d 18 O atm , recalling chemical data at the same depth, requires processes of diffusion after the mixing or even postcoring, placing limits to the interpretation of some classical paleoclimatic proxies in small scale mixed ice (<1 m). |
author2 |
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) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) 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)) University of Copenhagen = Københavns Universitet (UCPH) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) |
format |
Article in Journal/Newspaper |
author |
Landais, Amaelle Steffensen, Jørgen Peder Caillon, Nicolas Jouzel, Jean Masson-Delmotte, Valérie Schwander, Jakob |
author_facet |
Landais, Amaelle Steffensen, Jørgen Peder Caillon, Nicolas Jouzel, Jean Masson-Delmotte, Valérie Schwander, Jakob |
author_sort |
Landais, Amaelle |
title |
Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes |
title_short |
Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes |
title_full |
Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes |
title_fullStr |
Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes |
title_full_unstemmed |
Evidence for stratigraphic distortion in the Greenland Ice Core Project (GRIP) ice core during Event 5e1 (120 kyr BP) from gas isotopes |
title_sort |
evidence for stratigraphic distortion in the greenland ice core project (grip) ice core during event 5e1 (120 kyr bp) from gas isotopes |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-03103789 https://hal.science/hal-03103789/document https://hal.science/hal-03103789/file/2003JD004193.pdf https://doi.org/10.1029/2003JD004193 |
genre |
Greenland Greenland ice core Greenland Ice core Project GRIP ice core |
genre_facet |
Greenland Greenland ice core Greenland Ice core Project GRIP ice core |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-03103789 Journal of Geophysical Research: Atmospheres, 2004, 109 (D6), pp.n/a-n/a. ⟨10.1029/2003JD004193⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2003JD004193 hal-03103789 https://hal.science/hal-03103789 https://hal.science/hal-03103789/document https://hal.science/hal-03103789/file/2003JD004193.pdf doi:10.1029/2003JD004193 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2003JD004193 |
container_title |
Journal of Geophysical Research: Atmospheres |
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109 |
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D6 |
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1797583809593475072 |