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: | , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.science/hal-02395942 https://hal.science/hal-02395942v1/document https://hal.science/hal-02395942v1/file/cp-15-913-2019.pdf https://doi.org/10.5194/cp-15-913-2019 |
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openpolar |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
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ftsorbonneuniv |
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, A Buizert, Christo Brook, Edward, A 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 de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG) 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, A Buizert, Christo Brook, Edward, A |
author_facet |
Chowdhry Beeman, Jai Gest, Léa Parrenin, Frédéric Raynaud, Dominique Fudge, Tyler, A Buizert, Christo Brook, Edward, A |
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.science/hal-02395942 https://hal.science/hal-02395942v1/document https://hal.science/hal-02395942v1/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 Dome Fuji Dronning Maud Land The Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic Dome Fuji Dronning Maud Land The Antarctic West Antarctic Ice Sheet |
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.science/hal-02395942 Climate of the Past, 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 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
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 |
_version_ |
1812815531146739712 |
spelling |
ftsorbonneuniv:oai:HAL:hal-02395942v1 2024-10-13T14:02:12+00:00 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, A Buizert, Christo Brook, Edward, A Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG) 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.science/hal-02395942 https://hal.science/hal-02395942v1/document https://hal.science/hal-02395942v1/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 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02395942 Climate of the Past, 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 ftsorbonneuniv https://doi.org/10.5194/cp-15-913-2019 2024-09-23T14:19:20Z 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 HAL Sorbonne Université Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Dronning Maud Land The Antarctic West Antarctic Ice Sheet Climate of the Past 15 3 913 926 |