Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2)
The present work is based on the measurement of carbon dioxide (CO2) and its stable isotopic ratio δ13CO2 in air bubbles trapped in polar ice (EPICA core, Dome C, in Antartica, EDC). We focus on rapid transitions from glacial to interglacial periods. δ13CO2 allows the partitioning of the origin of C...
Main Author: | |
---|---|
Other Authors: | , , , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
HAL CCSD
2008
|
Subjects: | |
Online Access: | https://theses.hal.science/tel-00370658 https://theses.hal.science/tel-00370658/document https://theses.hal.science/tel-00370658/file/PhD_manuscript_AL.pdf |
id |
ftunivsavoie:oai:HAL:tel-00370658v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
CO2 cycle du carbone déglaciations carottes des glaces isotopes stables paléoclimatologie cycles biogéochimiques Antarctique Termination I Termination II bulles clathrates expérimentation carbon cycle ice cores stable isotopes paleoclimatology biogeochemical cycles Antarctica bubbles [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
CO2 cycle du carbone déglaciations carottes des glaces isotopes stables paléoclimatologie cycles biogéochimiques Antarctique Termination I Termination II bulles clathrates expérimentation carbon cycle ice cores stable isotopes paleoclimatology biogeochemical cycles Antarctica bubbles [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Lourantou, Anna Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) |
topic_facet |
CO2 cycle du carbone déglaciations carottes des glaces isotopes stables paléoclimatologie cycles biogéochimiques Antarctique Termination I Termination II bulles clathrates expérimentation carbon cycle ice cores stable isotopes paleoclimatology biogeochemical cycles Antarctica bubbles [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
The present work is based on the measurement of carbon dioxide (CO2) and its stable isotopic ratio δ13CO2 in air bubbles trapped in polar ice (EPICA core, Dome C, in Antartica, EDC). We focus on rapid transitions from glacial to interglacial periods. δ13CO2 allows the partitioning of the origin of CO2 between oceanic and terrestrial sources. This study documents with high temporal resolution the evolution of CO2 and δ13CO2 during the two last deglaciations. The last deglaciation is characterized by an increase of 80 ppmv CO2, coeval with a decrease of 0.6 ‰ in δ13CO2. Larger amplitudes were observed during the penultimate deglaciation (+110 ppmv CO2 with a 0.9 ‰ decrease in δ13CO2). The measurements, interpreted with two carbon cycle models (BOXKIT and BICYCLE) are consistent with the following scenario. First, a Southern Hemisphere warming triggers an increase in atmospheric CO2. This provokes a biological and physical reorganization of the Southern Ocean which reduces δ13CO2. Last, this reorganization propagates to the north with a delayed impact of terrestrial biosphere during the Bølling/Allerød (B/A). These results obtained for the first time from the EDC core allowed to propose a scenario on the causes of deglaciations. A series of tests, based on ice of different properties, provided a validation of our extraction method. Ce travail de thèse est basé sur la mesure du dioxyde de carbone, CO2, et de son isotopologue stable δ13CO2 dans les bulles d'air emprisonnées dans la glace polaire (carotte EPICA Dome C en Antarctique, EDC). On s'intéresse aux transitions rapides entre périodes glaciaires et interglaciaires. Le δ13CO2 permet de départager l'origine du CO2 entre les sources océaniques ou terrestres. Cette étude documente à haute résolution temporelle l'évolution du CO2 et du δ13CO2 pendant les deux dernières déglaciations. La dernière déglaciation est caractérisée par une augmentation en CO2 de 80 ppmv, accompagnée par une diminution en δ13CO2 de 0.6 ‰. Des amplitudes plus importantes sont observées ... |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Joseph-Fourier - Grenoble I Jérôme Chappellaz(chappellaz@lgge.obs.ujf-grenoble.fr) EPICA/MIS INSU QUEST DESIRE GREENCYCLES |
format |
Doctoral or Postdoctoral Thesis |
author |
Lourantou, Anna |
author_facet |
Lourantou, Anna |
author_sort |
Lourantou, Anna |
title |
Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) |
title_short |
Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) |
title_full |
Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) |
title_fullStr |
Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) |
title_full_unstemmed |
Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) |
title_sort |
constraints on the carbon dioxide (co2) deglacial rise based on its stable carbon isotopic ratio (δ13co2) |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://theses.hal.science/tel-00370658 https://theses.hal.science/tel-00370658/document https://theses.hal.science/tel-00370658/file/PhD_manuscript_AL.pdf |
genre |
Antarc* Antarctica Antarctique* antartic* EPICA Southern Ocean |
genre_facet |
Antarc* Antarctica Antarctique* antartic* EPICA Southern Ocean |
op_source |
https://theses.hal.science/tel-00370658 Climatology. Université Joseph-Fourier - Grenoble I, 2008. English. ⟨NNT : ⟩ |
op_relation |
tel-00370658 https://theses.hal.science/tel-00370658 https://theses.hal.science/tel-00370658/document https://theses.hal.science/tel-00370658/file/PhD_manuscript_AL.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797586940984295424 |
spelling |
ftunivsavoie:oai:HAL:tel-00370658v1 2024-04-28T07:57:08+00:00 Constraints on the carbon dioxide (CO2) deglacial rise based on its stable carbon isotopic ratio (δ13CO2) Contraindre l'augmentation en dioxyde de carbone (CO2) lors des déglaciations basés sur son rapport isotopique stable du carbone (δ13CO2) Lourantou, Anna Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Université Joseph-Fourier - Grenoble I Jérôme Chappellaz(chappellaz@lgge.obs.ujf-grenoble.fr) EPICA/MIS INSU QUEST DESIRE GREENCYCLES 2008-12-22 https://theses.hal.science/tel-00370658 https://theses.hal.science/tel-00370658/document https://theses.hal.science/tel-00370658/file/PhD_manuscript_AL.pdf en eng HAL CCSD tel-00370658 https://theses.hal.science/tel-00370658 https://theses.hal.science/tel-00370658/document https://theses.hal.science/tel-00370658/file/PhD_manuscript_AL.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00370658 Climatology. Université Joseph-Fourier - Grenoble I, 2008. English. ⟨NNT : ⟩ CO2 cycle du carbone déglaciations carottes des glaces isotopes stables paléoclimatologie cycles biogéochimiques Antarctique Termination I Termination II bulles clathrates expérimentation carbon cycle ice cores stable isotopes paleoclimatology biogeochemical cycles Antarctica bubbles [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2008 ftunivsavoie 2024-04-11T00:33:51Z The present work is based on the measurement of carbon dioxide (CO2) and its stable isotopic ratio δ13CO2 in air bubbles trapped in polar ice (EPICA core, Dome C, in Antartica, EDC). We focus on rapid transitions from glacial to interglacial periods. δ13CO2 allows the partitioning of the origin of CO2 between oceanic and terrestrial sources. This study documents with high temporal resolution the evolution of CO2 and δ13CO2 during the two last deglaciations. The last deglaciation is characterized by an increase of 80 ppmv CO2, coeval with a decrease of 0.6 ‰ in δ13CO2. Larger amplitudes were observed during the penultimate deglaciation (+110 ppmv CO2 with a 0.9 ‰ decrease in δ13CO2). The measurements, interpreted with two carbon cycle models (BOXKIT and BICYCLE) are consistent with the following scenario. First, a Southern Hemisphere warming triggers an increase in atmospheric CO2. This provokes a biological and physical reorganization of the Southern Ocean which reduces δ13CO2. Last, this reorganization propagates to the north with a delayed impact of terrestrial biosphere during the Bølling/Allerød (B/A). These results obtained for the first time from the EDC core allowed to propose a scenario on the causes of deglaciations. A series of tests, based on ice of different properties, provided a validation of our extraction method. Ce travail de thèse est basé sur la mesure du dioxyde de carbone, CO2, et de son isotopologue stable δ13CO2 dans les bulles d'air emprisonnées dans la glace polaire (carotte EPICA Dome C en Antarctique, EDC). On s'intéresse aux transitions rapides entre périodes glaciaires et interglaciaires. Le δ13CO2 permet de départager l'origine du CO2 entre les sources océaniques ou terrestres. Cette étude documente à haute résolution temporelle l'évolution du CO2 et du δ13CO2 pendant les deux dernières déglaciations. La dernière déglaciation est caractérisée par une augmentation en CO2 de 80 ppmv, accompagnée par une diminution en δ13CO2 de 0.6 ‰. Des amplitudes plus importantes sont observées ... Doctoral or Postdoctoral Thesis Antarc* Antarctica Antarctique* antartic* EPICA Southern Ocean Université Savoie Mont Blanc: HAL |