Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations
In order to study the climate variations recorded by ice cores, it is necessary to have precise chronologies for the ice and gas phases. The aim of this work has been to improve ice cores chronologies, covering the last 800 000 years, through new measurements of the isotopic composition of the air δ...
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Other Authors: | , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2015
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Online Access: | https://tel.archives-ouvertes.fr/tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451/document https://tel.archives-ouvertes.fr/tel-01245451/file/pdf2star-1450194526-2015VERS013V.pdf |
id |
ftccsdartic:oai:HAL:tel-01245451v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Air isotopic composition Greenland Ice cores Antarctic Datation Orbital tuning Variations glaciaire-interglaciaires Glacial-interglacial variations Synchronisation orbitale Composition isotopique de l'air Carottes de glace Groenland Antarctique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
Air isotopic composition Greenland Ice cores Antarctic Datation Orbital tuning Variations glaciaire-interglaciaires Glacial-interglacial variations Synchronisation orbitale Composition isotopique de l'air Carottes de glace Groenland Antarctique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Bazin, Lucie Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
topic_facet |
Air isotopic composition Greenland Ice cores Antarctic Datation Orbital tuning Variations glaciaire-interglaciaires Glacial-interglacial variations Synchronisation orbitale Composition isotopique de l'air Carottes de glace Groenland Antarctique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
In order to study the climate variations recorded by ice cores, it is necessary to have precise chronologies for the ice and gas phases. The aim of this work has been to improve ice cores chronologies, covering the last 800 000 years, through new measurements of the isotopic composition of the air δ15N, δ18Oatm et δO2/N2) trapped in EPICA Dome C (EDC) ice core and the use of the Datice dating tool.The first important result of this PhD has been the production of the Antarctic Ice Core Chronology (AICC2012), common for EDC, Vostok, EPICA Droning Maud Land (EDML), TALos Dome ICE core (TALDICE) and NorthGRIP ice cores. The bipolar see-saw theory is still valid on the new chronology. The AICC2012 chronology gives an age for Termination II in good agreement with other climate archives. Moreover, the duration of interglacial periods is unchanged compared to EDC3. While building the AICC2012 chronology, we have pointed out several limitations. Since then, we have improved Datice in order to correctly integrate constraints deduced from layer counting and their associated uncertainties. These improvements permit to build coherent chronologies respecting the underlying hypotheses of Datice. Moreover, we propose a new parameterization of the uncertainty associated with the background thinning function based on ice mechanical properties of EDC ice core. Finally, we were able to deduce new age constraints thanks to the new measurements of δO2/N2 and δ18Oatm performed on well-conserved ice from EDC. A multi-proxy comparison of Vostok, EDC and Dome F ice cores over MIS 5 has highlighted a possible influence of local climatic parameters on δO2/N2. The analysis of the delay between δ18Oatm and precession shows some variability over the last 800 ka. We propose that the delay between δ18Oatm and precession is increased during periods associated with Heinrich events. The results obtained during this PhD should be used for the next ice core coherent chronology. Afin d’étudier les variations climatiques enregistrées par les ... |
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) Université de Versailles-Saint Quentin en Yvelines Amaëlle Landais |
format |
Doctoral or Postdoctoral Thesis |
author |
Bazin, Lucie |
author_facet |
Bazin, Lucie |
author_sort |
Bazin, Lucie |
title |
Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
title_short |
Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
title_full |
Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
title_fullStr |
Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
title_full_unstemmed |
Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
title_sort |
isotopic composition of air trapped in epica dome c and talos dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://tel.archives-ouvertes.fr/tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451/document https://tel.archives-ouvertes.fr/tel-01245451/file/pdf2star-1450194526-2015VERS013V.pdf |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic Dome F Greenland Talos Dome The Antarctic |
geographic_facet |
Antarctic Dome F Greenland Talos Dome The Antarctic |
genre |
Antarc* Antarctic Antarctique* EPICA Greenland Greenland ice cores Groenland ice core |
genre_facet |
Antarc* Antarctic Antarctique* EPICA Greenland Greenland ice cores Groenland ice core |
op_source |
https://tel.archives-ouvertes.fr/tel-01245451 Climatologie. Université de Versailles-Saint Quentin en Yvelines, 2015. Français. ⟨NNT : 2015VERS013V⟩ |
op_relation |
NNT: 2015VERS013V tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451/document https://tel.archives-ouvertes.fr/tel-01245451/file/pdf2star-1450194526-2015VERS013V.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766252310025994240 |
spelling |
ftccsdartic:oai:HAL:tel-01245451v1 2023-05-15T13:49:48+02:00 Isotopic composition of air trapped in EPICA Dome C and Talos Dome ice cores in order to constrain the influence of orbital forcing and greenhouse gases on glacial–interglacial variations Analyse de l’air piégé dans les carottes de glace de Dôme C et Talos Dôme pour mieux contraindre le rôle du forçage orbital et des gaz à effet de serre dans les variations glaciaire-interglaciaire Bazin, Lucie 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) Université de Versailles-Saint Quentin en Yvelines Amaëlle Landais 2015-01-29 https://tel.archives-ouvertes.fr/tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451/document https://tel.archives-ouvertes.fr/tel-01245451/file/pdf2star-1450194526-2015VERS013V.pdf fr fre HAL CCSD NNT: 2015VERS013V tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451 https://tel.archives-ouvertes.fr/tel-01245451/document https://tel.archives-ouvertes.fr/tel-01245451/file/pdf2star-1450194526-2015VERS013V.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-01245451 Climatologie. Université de Versailles-Saint Quentin en Yvelines, 2015. Français. ⟨NNT : 2015VERS013V⟩ Air isotopic composition Greenland Ice cores Antarctic Datation Orbital tuning Variations glaciaire-interglaciaires Glacial-interglacial variations Synchronisation orbitale Composition isotopique de l'air Carottes de glace Groenland Antarctique [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/doctoralThesis Theses 2015 ftccsdartic 2021-12-19T02:49:40Z In order to study the climate variations recorded by ice cores, it is necessary to have precise chronologies for the ice and gas phases. The aim of this work has been to improve ice cores chronologies, covering the last 800 000 years, through new measurements of the isotopic composition of the air δ15N, δ18Oatm et δO2/N2) trapped in EPICA Dome C (EDC) ice core and the use of the Datice dating tool.The first important result of this PhD has been the production of the Antarctic Ice Core Chronology (AICC2012), common for EDC, Vostok, EPICA Droning Maud Land (EDML), TALos Dome ICE core (TALDICE) and NorthGRIP ice cores. The bipolar see-saw theory is still valid on the new chronology. The AICC2012 chronology gives an age for Termination II in good agreement with other climate archives. Moreover, the duration of interglacial periods is unchanged compared to EDC3. While building the AICC2012 chronology, we have pointed out several limitations. Since then, we have improved Datice in order to correctly integrate constraints deduced from layer counting and their associated uncertainties. These improvements permit to build coherent chronologies respecting the underlying hypotheses of Datice. Moreover, we propose a new parameterization of the uncertainty associated with the background thinning function based on ice mechanical properties of EDC ice core. Finally, we were able to deduce new age constraints thanks to the new measurements of δO2/N2 and δ18Oatm performed on well-conserved ice from EDC. A multi-proxy comparison of Vostok, EDC and Dome F ice cores over MIS 5 has highlighted a possible influence of local climatic parameters on δO2/N2. The analysis of the delay between δ18Oatm and precession shows some variability over the last 800 ka. We propose that the delay between δ18Oatm and precession is increased during periods associated with Heinrich events. The results obtained during this PhD should be used for the next ice core coherent chronology. Afin d’étudier les variations climatiques enregistrées par les ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctique* EPICA Greenland Greenland ice cores Groenland ice core Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Dome F ENVELOPE(39.700,39.700,-77.317,-77.317) Greenland Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) The Antarctic |