A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years
ASTER Team: Georges Aumaître, Didier L. Bourlès and Karim Keddadouche International audience Debris-covered glaciers constitute a large part of the world's cryosphere. However, little is known about their long-term response to multi-millennial climate variability, in particular in the Southern...
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Online Access: | https://hal.science/hal-02988434 https://hal.science/hal-02988434/document https://hal.science/hal-02988434/file/Charton%20et%20al.%202020%20preprint.pdf https://doi.org/10.1017/S0954102020000541 |
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ftanrparis:oai:HAL:hal-02988434v1 2024-06-23T07:47:34+00:00 A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaitre, Georges Bourlès, Didier Keddadouche, Karim Université Paris 1 Panthéon-Sorbonne (UP1) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université Catholique de Louvain = Catholic University of Louvain (UCL) Université Grenoble Alpes (UGA) French INSU LEFE Glacepreker project IPEV Kesaaco 1048 project ANR-11-LABX-0046,Dynamite,Dynamiques Territoriales et spatiales(2011) 2021 https://hal.science/hal-02988434 https://hal.science/hal-02988434/document https://hal.science/hal-02988434/file/Charton%20et%20al.%202020%20preprint.pdf https://doi.org/10.1017/S0954102020000541 en eng HAL CCSD Cambridge University Press (CUP) info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102020000541 hal-02988434 https://hal.science/hal-02988434 https://hal.science/hal-02988434/document https://hal.science/hal-02988434/file/Charton%20et%20al.%202020%20preprint.pdf doi:10.1017/S0954102020000541 WOS: 000623420200010 info:eu-repo/semantics/OpenAccess ISSN: 0954-1020 EISSN: 1365-2079 Antarctic Science https://hal.science/hal-02988434 Antarctic Science, 2021, 33, pp.103-115. ⟨10.1017/S0954102020000541⟩ https://www.cambridge.org/core/journals/antarctic-science/ glacier fluctuations in situ cosmogenic chlorine-36 dating paleoclimate Antarctic Cold Reversal Holocene sub-Antarctic [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2021 ftanrparis https://doi.org/10.1017/S0954102020000541 2024-06-12T23:47:17Z ASTER Team: Georges Aumaître, Didier L. Bourlès and Karim Keddadouche International audience Debris-covered glaciers constitute a large part of the world's cryosphere. However, little is known about their long-term response to multi-millennial climate variability, in particular in the Southern Hemisphere. Here, we provide first insights into the response of a debris-covered glacier to multi-millennial climate variability in the sub-Antarctic Kerguelen Archipelago, which can be compared to that of recently investigated debris-free glaciers. We focus on the Gentil Glacier and present thirteen new 36 Cl cosmic-ray exposure ages from moraine boulders. The Gentil Glacier experienced at least two glacial advancesthe first one during the Late Glacial (19.0-11.6 ka) at ~14.3 ka and the second one during the Late Holocene at ~2.6 ka. Both debris-covered and debris-free glaciers advanced broadly synchronously during the Late Glacial, most probably during the Antarctic Cold Reversal event (14.5-12.9 ka). This suggests that both glacier types at Kerguelen were sensitive to abrupt temperature changes recorded in Antarctic ice cores, associated with increased moisture. However, during the late Holocene, the advance at about ~2.6 ka was not observed in other glaciers and seems to be an original feature of the debris-covered Gentil Glacier, either related to distinct dynamics or distinct sensitivity to precipitation changes. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Portail HAL-ANR (Agence Nationale de la Recherche) Antarctic The Antarctic Kerguelen Antarctic Science 33 1 103 115 |
institution |
Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
glacier fluctuations in situ cosmogenic chlorine-36 dating paleoclimate Antarctic Cold Reversal Holocene sub-Antarctic [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
glacier fluctuations in situ cosmogenic chlorine-36 dating paleoclimate Antarctic Cold Reversal Holocene sub-Antarctic [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaitre, Georges Bourlès, Didier Keddadouche, Karim A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
topic_facet |
glacier fluctuations in situ cosmogenic chlorine-36 dating paleoclimate Antarctic Cold Reversal Holocene sub-Antarctic [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
ASTER Team: Georges Aumaître, Didier L. Bourlès and Karim Keddadouche International audience Debris-covered glaciers constitute a large part of the world's cryosphere. However, little is known about their long-term response to multi-millennial climate variability, in particular in the Southern Hemisphere. Here, we provide first insights into the response of a debris-covered glacier to multi-millennial climate variability in the sub-Antarctic Kerguelen Archipelago, which can be compared to that of recently investigated debris-free glaciers. We focus on the Gentil Glacier and present thirteen new 36 Cl cosmic-ray exposure ages from moraine boulders. The Gentil Glacier experienced at least two glacial advancesthe first one during the Late Glacial (19.0-11.6 ka) at ~14.3 ka and the second one during the Late Holocene at ~2.6 ka. Both debris-covered and debris-free glaciers advanced broadly synchronously during the Late Glacial, most probably during the Antarctic Cold Reversal event (14.5-12.9 ka). This suggests that both glacier types at Kerguelen were sensitive to abrupt temperature changes recorded in Antarctic ice cores, associated with increased moisture. However, during the late Holocene, the advance at about ~2.6 ka was not observed in other glaciers and seems to be an original feature of the debris-covered Gentil Glacier, either related to distinct dynamics or distinct sensitivity to precipitation changes. |
author2 |
Université Paris 1 Panthéon-Sorbonne (UP1) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Université Catholique de Louvain = Catholic University of Louvain (UCL) Université Grenoble Alpes (UGA) French INSU LEFE Glacepreker project IPEV Kesaaco 1048 project ANR-11-LABX-0046,Dynamite,Dynamiques Territoriales et spatiales(2011) |
format |
Article in Journal/Newspaper |
author |
Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaitre, Georges Bourlès, Didier Keddadouche, Karim |
author_facet |
Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaitre, Georges Bourlès, Didier Keddadouche, Karim |
author_sort |
Charton, Joanna |
title |
A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
title_short |
A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
title_full |
A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
title_fullStr |
A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
title_full_unstemmed |
A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
title_sort |
debris-covered glacier at kerguelen (49°s, 69°e) over the past 15 000 years |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-02988434 https://hal.science/hal-02988434/document https://hal.science/hal-02988434/file/Charton%20et%20al.%202020%20preprint.pdf https://doi.org/10.1017/S0954102020000541 |
geographic |
Antarctic The Antarctic Kerguelen |
geographic_facet |
Antarctic The Antarctic Kerguelen |
genre |
Antarc* Antarctic Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Science |
op_source |
ISSN: 0954-1020 EISSN: 1365-2079 Antarctic Science https://hal.science/hal-02988434 Antarctic Science, 2021, 33, pp.103-115. ⟨10.1017/S0954102020000541⟩ https://www.cambridge.org/core/journals/antarctic-science/ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102020000541 hal-02988434 https://hal.science/hal-02988434 https://hal.science/hal-02988434/document https://hal.science/hal-02988434/file/Charton%20et%20al.%202020%20preprint.pdf doi:10.1017/S0954102020000541 WOS: 000623420200010 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1017/S0954102020000541 |
container_title |
Antarctic Science |
container_volume |
33 |
container_issue |
1 |
container_start_page |
103 |
op_container_end_page |
115 |
_version_ |
1802651694954184704 |