Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation
International audience The last deglaciation, which occurred from 18 000 to 11 000 years ago, is the most recent large natural climatic variation of global extent. With accurately dated paleocli-mate records, we can investigate the timings of related variables in the climate system during this major...
Published in: | Climate of the Past |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.archives-ouvertes.fr/hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942/document https://hal.archives-ouvertes.fr/hal-02395942/file/cp-15-913-2019.pdf https://doi.org/10.5194/cp-15-913-2019 |
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ftccsdartic:oai:HAL:hal-02395942v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Chowdhry Beeman, Jai Gest, Léa Parrenin, Frédéric Raynaud, Dominique Fudge, Tyler, Buizert, Christo Brook, Edward Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience The last deglaciation, which occurred from 18 000 to 11 000 years ago, is the most recent large natural climatic variation of global extent. With accurately dated paleocli-mate records, we can investigate the timings of related variables in the climate system during this major transition. Here, we use an accurate relative chronology to compare temperature proxy data and global atmospheric CO 2 as recorded in Antarctic ice cores. In addition to five regional records, we compare a δ 18 O stack, representing Antarctic climate variations with the high-resolution robustly dated WAIS Divide CO 2 record (West Antarctic Ice Sheet). We assess the CO 2 and Antarctic temperature phase relationship using a stochas-tic method to accurately identify the probable timings of changes in their trends. Four coherent changes are identified for the two series, and synchrony between CO 2 and temperature is within the 95 % uncertainty range for all of the changes except the end of glacial termination 1 (T1). During the onset of the last deglaciation at 18 ka and the deglacia-tion end at 11.5 ka, Antarctic temperature most likely led CO 2 by several centuries (by 570 years, within a range of 127 to 751 years, 68 % probability, at the T1 onset; and by 532 years, within a range of 337 to 629 years, 68 % probability , at the deglaciation end). At 14.4 ka, the onset of the Antarctic Cold Reversal (ACR) period, our results do not show a clear lead or lag (Antarctic temperature leads by 50 years, within a range of −137 to 376 years, 68 % probability). The same is true at the end of the ACR (CO 2 leads by 65 years, within a range of 211 to 117 years, 68 % probability). However, the timings of changes in trends for the individual proxy records show variations from the stack, indicating regional differences in the pattern of temperature change, particularly in the WAIS Divide record at the onset of the deglaciation; the Dome Fuji record at the deglaciation end; and the EDML record after 16 ka (EPICA Dronning Maud Land, ... |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Groupe d'étude des méthodes de l'analyse sociologique (GEMAS) Université Paris-Sorbonne (UP4)-Centre National de la Recherche Scientifique (CNRS) University of Washington Seattle College of Earth, Ocean and Atmospheric Sciences Corvallis (CEOAS) Oregon State University (OSU) Centre National de la Recherche Scientifique (grant LEFE IceChrono and LEFE CO2Role) The Fondation Ars et Cuttoli (grantCO2Role). |
format |
Article in Journal/Newspaper |
author |
Chowdhry Beeman, Jai Gest, Léa Parrenin, Frédéric Raynaud, Dominique Fudge, Tyler, Buizert, Christo Brook, Edward |
author_facet |
Chowdhry Beeman, Jai Gest, Léa Parrenin, Frédéric Raynaud, Dominique Fudge, Tyler, Buizert, Christo Brook, Edward |
author_sort |
Chowdhry Beeman, Jai |
title |
Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation |
title_short |
Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation |
title_full |
Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation |
title_fullStr |
Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation |
title_full_unstemmed |
Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation |
title_sort |
antarctic temperature and co 2 : near-synchrony yet variable phasing during the last deglaciation |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942/document https://hal.archives-ouvertes.fr/hal-02395942/file/cp-15-913-2019.pdf https://doi.org/10.5194/cp-15-913-2019 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic The Antarctic Dronning Maud Land West Antarctic Ice Sheet Dome Fuji |
geographic_facet |
Antarctic The Antarctic Dronning Maud Land West Antarctic Ice Sheet Dome Fuji |
genre |
Antarc* Antarctic Dronning Maud Land EPICA Ice Sheet |
genre_facet |
Antarc* Antarctic Dronning Maud Land EPICA Ice Sheet |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-02395942 Climate of the Past, European Geosciences Union (EGU), 2019, 15 (3), pp.913-926. ⟨10.5194/cp-15-913-2019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-15-913-2019 hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942/document https://hal.archives-ouvertes.fr/hal-02395942/file/cp-15-913-2019.pdf doi:10.5194/cp-15-913-2019 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.5194/cp-15-913-2019 |
container_title |
Climate of the Past |
container_volume |
15 |
container_issue |
3 |
container_start_page |
913 |
op_container_end_page |
926 |
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1766266259801899008 |
spelling |
ftccsdartic:oai:HAL:hal-02395942v1 2023-05-15T13:58:09+02:00 Antarctic temperature and CO 2 : near-synchrony yet variable phasing during the last deglaciation Chowdhry Beeman, Jai Gest, Léa Parrenin, Frédéric Raynaud, Dominique Fudge, Tyler, Buizert, Christo Brook, Edward Institut des Géosciences de l’Environnement (IGE) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Groupe d'étude des méthodes de l'analyse sociologique (GEMAS) Université Paris-Sorbonne (UP4)-Centre National de la Recherche Scientifique (CNRS) University of Washington Seattle College of Earth, Ocean and Atmospheric Sciences Corvallis (CEOAS) Oregon State University (OSU) Centre National de la Recherche Scientifique (grant LEFE IceChrono and LEFE CO2Role) The Fondation Ars et Cuttoli (grantCO2Role). 2019 https://hal.archives-ouvertes.fr/hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942/document https://hal.archives-ouvertes.fr/hal-02395942/file/cp-15-913-2019.pdf https://doi.org/10.5194/cp-15-913-2019 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-15-913-2019 hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942 https://hal.archives-ouvertes.fr/hal-02395942/document https://hal.archives-ouvertes.fr/hal-02395942/file/cp-15-913-2019.pdf doi:10.5194/cp-15-913-2019 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess CC-BY-NC ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-02395942 Climate of the Past, European Geosciences Union (EGU), 2019, 15 (3), pp.913-926. ⟨10.5194/cp-15-913-2019⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.5194/cp-15-913-2019 2021-11-21T00:40:40Z International audience The last deglaciation, which occurred from 18 000 to 11 000 years ago, is the most recent large natural climatic variation of global extent. With accurately dated paleocli-mate records, we can investigate the timings of related variables in the climate system during this major transition. Here, we use an accurate relative chronology to compare temperature proxy data and global atmospheric CO 2 as recorded in Antarctic ice cores. In addition to five regional records, we compare a δ 18 O stack, representing Antarctic climate variations with the high-resolution robustly dated WAIS Divide CO 2 record (West Antarctic Ice Sheet). We assess the CO 2 and Antarctic temperature phase relationship using a stochas-tic method to accurately identify the probable timings of changes in their trends. Four coherent changes are identified for the two series, and synchrony between CO 2 and temperature is within the 95 % uncertainty range for all of the changes except the end of glacial termination 1 (T1). During the onset of the last deglaciation at 18 ka and the deglacia-tion end at 11.5 ka, Antarctic temperature most likely led CO 2 by several centuries (by 570 years, within a range of 127 to 751 years, 68 % probability, at the T1 onset; and by 532 years, within a range of 337 to 629 years, 68 % probability , at the deglaciation end). At 14.4 ka, the onset of the Antarctic Cold Reversal (ACR) period, our results do not show a clear lead or lag (Antarctic temperature leads by 50 years, within a range of −137 to 376 years, 68 % probability). The same is true at the end of the ACR (CO 2 leads by 65 years, within a range of 211 to 117 years, 68 % probability). However, the timings of changes in trends for the individual proxy records show variations from the stack, indicating regional differences in the pattern of temperature change, particularly in the WAIS Divide record at the onset of the deglaciation; the Dome Fuji record at the deglaciation end; and the EDML record after 16 ka (EPICA Dronning Maud Land, ... Article in Journal/Newspaper Antarc* Antarctic Dronning Maud Land EPICA Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Dronning Maud Land West Antarctic Ice Sheet Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 15 3 913 926 |