Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland
International audience We have reconstructed chronology for the disturbed bottom parts of the GRIP and GISP2 ice cores using the combined paleoatmospheric records of CH 4 concentration and d 18 O atm in the trapped gases. Our reconstructed ages for basal ice samples are based on comparison of publis...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900/document https://hal.archives-ouvertes.fr/hal-03189900/file/2005JD006032.pdf https://doi.org/10.1029/2005jd006032 |
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ftccsdartic:oai:HAL:hal-03189900v1 2023-05-15T16:28:29+02:00 Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland Suwa, Makoto von Fischer, Joseph, Bender, Michael LANDAIS, AMAELLE Brook, Edward Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) 2006-01-17 https://hal.archives-ouvertes.fr/hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900/document https://hal.archives-ouvertes.fr/hal-03189900/file/2005JD006032.pdf https://doi.org/10.1029/2005jd006032 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005jd006032 hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900/document https://hal.archives-ouvertes.fr/hal-03189900/file/2005JD006032.pdf doi:10.1029/2005jd006032 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.archives-ouvertes.fr/hal-03189900 Journal of Geophysical Research, American Geophysical Union, 2006, 111 (D2), ⟨10.1029/2005jd006032⟩ [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 2006 ftccsdartic https://doi.org/10.1029/2005jd006032 2021-12-19T00:19:09Z International audience We have reconstructed chronology for the disturbed bottom parts of the GRIP and GISP2 ice cores using the combined paleoatmospheric records of CH 4 concentration and d 18 O atm in the trapped gases. Our reconstructed ages for basal ice samples are based on comparison of published measurements of CH 4 and d 18 O atm from the disturbed section of the GRIP and GISP2 cores with the same properties in the Vostok ice core. NGRIP d 18 O ice values are also used to constrain the chronology during the end of marine isotope stage 5e. For each sample, we assign an age that represents the unique or most probable time of gas trapping, given its gas composition. Of 157 samples with CH 4 and d 18 O atm data, 10 give unique ages. Twenty-five newly measured values of the triple isotope composition of O 2 from the disturbed section of the GISP2 core add a third time-dependent gas property that agrees with our reconstruction. Our reconstruction supports earlier conclusions of Landais et al. (2003) that the disturbed section primarily includes ice from the last interglacial (MIS 5e) and the penultimate glacial period (MIS 6). The oldest ice in the basal layer of GISP2 and GRIP has an age !237 ka. The climate history we derive suggests that the last interglacial at Summit, Greenland, around 127 ka was slightly warmer than the current interglacial period. Reduction of various ion concentrations in ice and thickening of the ice sheet during Termination II was similar to that in Termination I. Article in Journal/Newspaper Greenland GRIP ice core Ice Sheet NGRIP Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Journal of Geophysical Research 111 D2 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Suwa, Makoto von Fischer, Joseph, Bender, Michael LANDAIS, AMAELLE Brook, Edward Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience We have reconstructed chronology for the disturbed bottom parts of the GRIP and GISP2 ice cores using the combined paleoatmospheric records of CH 4 concentration and d 18 O atm in the trapped gases. Our reconstructed ages for basal ice samples are based on comparison of published measurements of CH 4 and d 18 O atm from the disturbed section of the GRIP and GISP2 cores with the same properties in the Vostok ice core. NGRIP d 18 O ice values are also used to constrain the chronology during the end of marine isotope stage 5e. For each sample, we assign an age that represents the unique or most probable time of gas trapping, given its gas composition. Of 157 samples with CH 4 and d 18 O atm data, 10 give unique ages. Twenty-five newly measured values of the triple isotope composition of O 2 from the disturbed section of the GISP2 core add a third time-dependent gas property that agrees with our reconstruction. Our reconstruction supports earlier conclusions of Landais et al. (2003) that the disturbed section primarily includes ice from the last interglacial (MIS 5e) and the penultimate glacial period (MIS 6). The oldest ice in the basal layer of GISP2 and GRIP has an age !237 ka. The climate history we derive suggests that the last interglacial at Summit, Greenland, around 127 ka was slightly warmer than the current interglacial period. Reduction of various ion concentrations in ice and thickening of the ice sheet during Termination II was similar to that in Termination I. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
format |
Article in Journal/Newspaper |
author |
Suwa, Makoto von Fischer, Joseph, Bender, Michael LANDAIS, AMAELLE Brook, Edward |
author_facet |
Suwa, Makoto von Fischer, Joseph, Bender, Michael LANDAIS, AMAELLE Brook, Edward |
author_sort |
Suwa, Makoto |
title |
Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland |
title_short |
Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland |
title_full |
Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland |
title_fullStr |
Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland |
title_full_unstemmed |
Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland |
title_sort |
chronology reconstruction for the disturbed bottom section of the gisp2 and the grip ice cores: implications for termination ii in greenland |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.archives-ouvertes.fr/hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900/document https://hal.archives-ouvertes.fr/hal-03189900/file/2005JD006032.pdf https://doi.org/10.1029/2005jd006032 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland GRIP ice core Ice Sheet NGRIP |
genre_facet |
Greenland GRIP ice core Ice Sheet NGRIP |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.archives-ouvertes.fr/hal-03189900 Journal of Geophysical Research, American Geophysical Union, 2006, 111 (D2), ⟨10.1029/2005jd006032⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005jd006032 hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900 https://hal.archives-ouvertes.fr/hal-03189900/document https://hal.archives-ouvertes.fr/hal-03189900/file/2005JD006032.pdf doi:10.1029/2005jd006032 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2005jd006032 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
D2 |
_version_ |
1766018137873973248 |