A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years
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...
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Online Access: | http://hdl.handle.net/2078.1/254938 https://doi.org/10.1017/s0954102020000541 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:254938 2024-05-12T07:55:09+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 Aumaître, Georges Bourlès, Didier L. Keddadouche, Karim UCL - SST/ELI/ELIC - Earth & Climate 2020 http://hdl.handle.net/2078.1/254938 https://doi.org/10.1017/s0954102020000541 eng eng Cambridge University Press (CUP) boreal:254938 http://hdl.handle.net/2078.1/254938 doi:10.1017/s0954102020000541 urn:ISSN:0954-1020 urn:EISSN:1365-2079 info:eu-repo/semantics/openAccess Antarctic Science, Vol. 33, no.1, p. 103-115 (2020) Geology Ecology Evolution Behavior and Systematics Oceanography info:eu-repo/semantics/article 2020 ftunistlouisbrus https://doi.org/10.1017/s0954102020000541 2024-04-18T17:14:47Z 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 13 new 36Cl cosmic-ray exposure ages from moraine boulders. The Gentil Glacier experienced at least two glacial advances: the 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 ~2.6 ka was not observed in other glaciers and seems to be an original feature of the debris-covered Gentil Glacier, related to either distinct dynamics or to distinct sensitivity to precipitation changes. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science DIAL@USL-B (Université Saint-Louis, Bruxelles) Antarctic Kerguelen The Antarctic Antarctic Science 33 1 103 115 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
Geology Ecology Evolution Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology Evolution Behavior and Systematics Oceanography Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaître, Georges Bourlès, Didier L. Keddadouche, Karim A debris-covered glacier at Kerguelen (49°S, 69°E) over the past 15 000 years |
topic_facet |
Geology Ecology Evolution Behavior and Systematics Oceanography |
description |
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 13 new 36Cl cosmic-ray exposure ages from moraine boulders. The Gentil Glacier experienced at least two glacial advances: the 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 ~2.6 ka was not observed in other glaciers and seems to be an original feature of the debris-covered Gentil Glacier, related to either distinct dynamics or to distinct sensitivity to precipitation changes. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaître, Georges Bourlès, Didier L. Keddadouche, Karim |
author_facet |
Charton, Joanna Jomelli, Vincent Schimmelpfennig, Irene Verfaillie, Deborah Favier, Vincent Mokadem, Fatima Gilbert, Adrien Brun, Fanny Aumaître, Georges Bourlès, Didier L. 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 (49â°s, 69â°e) over the past 15 000 years |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://hdl.handle.net/2078.1/254938 https://doi.org/10.1017/s0954102020000541 |
geographic |
Antarctic Kerguelen The Antarctic |
geographic_facet |
Antarctic Kerguelen The Antarctic |
genre |
Antarc* Antarctic Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Science |
op_source |
Antarctic Science, Vol. 33, no.1, p. 103-115 (2020) |
op_relation |
boreal:254938 http://hdl.handle.net/2078.1/254938 doi:10.1017/s0954102020000541 urn:ISSN:0954-1020 urn:EISSN:1365-2079 |
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_ |
1798834533958680576 |