Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies
International audience A review of Byrd, Vostok and Dome C Antarctic ice-core records indicates significant changes in atmospheric characteristics between the late glacial maximum (LGM) and the Holocene. This data is relevant to general circulation model (GCM) boundary conditions and validation of o...
Published in: | Annals of Glaciology |
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Online Access: | https://hal.science/hal-03482758 https://doi.org/10.3189/1984AoG5-1-88-94 |
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ftunivnantes:oai:HAL:hal-03482758v1 2023-05-15T13:29:14+02:00 Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies Lorius, Claude Raynaud, D. Petit, J.-R. Jouzel, Jean Merlivat, Liliane 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) Laboratoire de Biogéochimie Isotopique Université Pierre et Marie Curie - Paris 6 (UPMC) 1984 https://hal.science/hal-03482758 https://doi.org/10.3189/1984AoG5-1-88-94 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.3189/1984AoG5-1-88-94 hal-03482758 https://hal.science/hal-03482758 doi:10.3189/1984AoG5-1-88-94 WOS: A1984TP83500017 ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-03482758 Annals of Glaciology, 1984, 5, pp.88-94. ⟨10.3189/1984AoG5-1-88-94⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 1984 ftunivnantes https://doi.org/10.3189/1984AoG5-1-88-94 2023-03-01T02:01:46Z International audience A review of Byrd, Vostok and Dome C Antarctic ice-core records indicates significant changes in atmospheric characteristics between the late glacial maximum (LGM) and the Holocene. This data is relevant to general circulation model (GCM) boundary conditions and validation of output results. Reciprocally, GCM data could help to interpret ice-core results and to extend observed high-latitude changes to a larger scale. During the LGM, low troposphere temperatures were colder by about 5 to 7°C and surface temperatures by 8 to 10°C over the Antarctic ice sheet. There are indications that snow accumulation was slightly lower and isotopic data suggests higher relative humidity over the ocean. A large increase in continental dust (up to a factor of 20) and marine aerosols (up to a factor of 5) is observed on the high Antarctic plateau, both explained by the increased (possibly up to 1.4 to 2 times) intensity of the large-scale atmospheric circulation modulated by desert and sea-ice area extension. Ice-core results show large changes in atmospheric CO 2 concentrations with LGM values around 200 ppmv and “pre-industrial” values of about 260 ppmv. Finally, determinations of total gas content suggest that central West and East Antarctica were not thicker during the LGM, in contrast with higher surface elevations inferred from coastal-ice studies. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet Sea ice Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic East Antarctica Byrd Annals of Glaciology 5 88 94 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Lorius, Claude Raynaud, D. Petit, J.-R. Jouzel, Jean Merlivat, Liliane Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience A review of Byrd, Vostok and Dome C Antarctic ice-core records indicates significant changes in atmospheric characteristics between the late glacial maximum (LGM) and the Holocene. This data is relevant to general circulation model (GCM) boundary conditions and validation of output results. Reciprocally, GCM data could help to interpret ice-core results and to extend observed high-latitude changes to a larger scale. During the LGM, low troposphere temperatures were colder by about 5 to 7°C and surface temperatures by 8 to 10°C over the Antarctic ice sheet. There are indications that snow accumulation was slightly lower and isotopic data suggests higher relative humidity over the ocean. A large increase in continental dust (up to a factor of 20) and marine aerosols (up to a factor of 5) is observed on the high Antarctic plateau, both explained by the increased (possibly up to 1.4 to 2 times) intensity of the large-scale atmospheric circulation modulated by desert and sea-ice area extension. Ice-core results show large changes in atmospheric CO 2 concentrations with LGM values around 200 ppmv and “pre-industrial” values of about 260 ppmv. Finally, determinations of total gas content suggest that central West and East Antarctica were not thicker during the LGM, in contrast with higher surface elevations inferred from coastal-ice studies. |
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) Laboratoire de Biogéochimie Isotopique Université Pierre et Marie Curie - Paris 6 (UPMC) |
format |
Article in Journal/Newspaper |
author |
Lorius, Claude Raynaud, D. Petit, J.-R. Jouzel, Jean Merlivat, Liliane |
author_facet |
Lorius, Claude Raynaud, D. Petit, J.-R. Jouzel, Jean Merlivat, Liliane |
author_sort |
Lorius, Claude |
title |
Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies |
title_short |
Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies |
title_full |
Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies |
title_fullStr |
Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies |
title_full_unstemmed |
Late-Glacial Maximum-Holocene Atmospheric and Ice-Thickness Changes from Antarctic Ice-Core Studies |
title_sort |
late-glacial maximum-holocene atmospheric and ice-thickness changes from antarctic ice-core studies |
publisher |
HAL CCSD |
publishDate |
1984 |
url |
https://hal.science/hal-03482758 https://doi.org/10.3189/1984AoG5-1-88-94 |
geographic |
Antarctic The Antarctic East Antarctica Byrd |
geographic_facet |
Antarctic The Antarctic East Antarctica Byrd |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet Sea ice |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet Sea ice |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-03482758 Annals of Glaciology, 1984, 5, pp.88-94. ⟨10.3189/1984AoG5-1-88-94⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/1984AoG5-1-88-94 hal-03482758 https://hal.science/hal-03482758 doi:10.3189/1984AoG5-1-88-94 WOS: A1984TP83500017 |
op_doi |
https://doi.org/10.3189/1984AoG5-1-88-94 |
container_title |
Annals of Glaciology |
container_volume |
5 |
container_start_page |
88 |
op_container_end_page |
94 |
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1765999422474289152 |