Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S)
International audience Abstract Due to the limited landmasses in the Southern Hemisphere, we must rely on data from sub-Antarctic islands within the Southern Ocean to record historical climate patterns. Over the past few decades, glaciers throughout the Southern Ocean region have experienced a notic...
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ftunivsavoie:oai:HAL:hal-04538575v1 2024-05-12T07:53:34+00:00 Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) Deline, Philip Linge, Henriette Ravanel, Ludovic Tuestad, Talin Lafite, Romain Arnaud, Fabien Bakke, Jostein Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) University of Bergen (UiB) 2024-02-26 https://hal.science/hal-04538575 https://doi.org/10.1017/S0954102023000378 en eng HAL CCSD Cambridge University Press (CUP) info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102023000378 hal-04538575 https://hal.science/hal-04538575 doi:10.1017/S0954102023000378 ISSN: 0954-1020 EISSN: 1365-2079 Antarctic Science https://hal.science/hal-04538575 Antarctic Science, 2024, pp.1-26. ⟨10.1017/S0954102023000378⟩ [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SHS.GEO]Humanities and Social Sciences/Geography info:eu-repo/semantics/article Journal articles 2024 ftunivsavoie https://doi.org/10.1017/S0954102023000378 2024-04-18T00:26:41Z International audience Abstract Due to the limited landmasses in the Southern Hemisphere, we must rely on data from sub-Antarctic islands within the Southern Ocean to record historical climate patterns. Over the past few decades, glaciers throughout the Southern Ocean region have experienced a noticeable retreat, especially in the Kerguelen Archipelago, whose glacial landforms offer valuable insights into long-term climate fluctuations. Our comprehensive glacial geomorphological study conducted in its remote north-western region meticulously examines morainic complexes from smaller cirque glaciers and larger outlet glaciers stemming from the Cook Ice Cap. We mapped these landforms to reconstruct historical glacier extents during the Holocene. The surface area of the three main glaciers had decreased in 1962–1964 by only 35% compared to their maximum extents, whereas surface area changes across 12 time intervals spanning from 1962 to 2019 from aerial and satellite imagery reveal a cumulative reduction of 43.5%. Additionally, we modelled changes in glacier thickness and equilibrium-line altitude for the key glaciers at three distinct stages: 1) their maximum extent before 1962, 2) the early 1960s and 3) 2019. This multifaceted analysis contributes valuable insights into the dynamics of Kerguelen's glaciers and the broader implications for understanding past and ongoing climate dynamics in the Southern Hemisphere. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Ice cap Southern Ocean Université Savoie Mont Blanc: HAL Antarctic Southern Ocean Kerguelen Antarctic Science 1 26 |
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Open Polar |
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Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SHS.GEO]Humanities and Social Sciences/Geography |
spellingShingle |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SHS.GEO]Humanities and Social Sciences/Geography Deline, Philip Linge, Henriette Ravanel, Ludovic Tuestad, Talin Lafite, Romain Arnaud, Fabien Bakke, Jostein Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) |
topic_facet |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SHS.GEO]Humanities and Social Sciences/Geography |
description |
International audience Abstract Due to the limited landmasses in the Southern Hemisphere, we must rely on data from sub-Antarctic islands within the Southern Ocean to record historical climate patterns. Over the past few decades, glaciers throughout the Southern Ocean region have experienced a noticeable retreat, especially in the Kerguelen Archipelago, whose glacial landforms offer valuable insights into long-term climate fluctuations. Our comprehensive glacial geomorphological study conducted in its remote north-western region meticulously examines morainic complexes from smaller cirque glaciers and larger outlet glaciers stemming from the Cook Ice Cap. We mapped these landforms to reconstruct historical glacier extents during the Holocene. The surface area of the three main glaciers had decreased in 1962–1964 by only 35% compared to their maximum extents, whereas surface area changes across 12 time intervals spanning from 1962 to 2019 from aerial and satellite imagery reveal a cumulative reduction of 43.5%. Additionally, we modelled changes in glacier thickness and equilibrium-line altitude for the key glaciers at three distinct stages: 1) their maximum extent before 1962, 2) the early 1960s and 3) 2019. This multifaceted analysis contributes valuable insights into the dynamics of Kerguelen's glaciers and the broader implications for understanding past and ongoing climate dynamics in the Southern Hemisphere. |
author2 |
Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) University of Bergen (UiB) |
format |
Article in Journal/Newspaper |
author |
Deline, Philip Linge, Henriette Ravanel, Ludovic Tuestad, Talin Lafite, Romain Arnaud, Fabien Bakke, Jostein |
author_facet |
Deline, Philip Linge, Henriette Ravanel, Ludovic Tuestad, Talin Lafite, Romain Arnaud, Fabien Bakke, Jostein |
author_sort |
Deline, Philip |
title |
Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) |
title_short |
Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) |
title_full |
Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) |
title_fullStr |
Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) |
title_full_unstemmed |
Mapping of morainic complexes and reconstruction of glacier dynamics north-east of Cook Ice Cap, Kerguelen Archipelago (49°S) |
title_sort |
mapping of morainic complexes and reconstruction of glacier dynamics north-east of cook ice cap, kerguelen archipelago (49°s) |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04538575 https://doi.org/10.1017/S0954102023000378 |
geographic |
Antarctic Southern Ocean Kerguelen |
geographic_facet |
Antarctic Southern Ocean Kerguelen |
genre |
Antarc* Antarctic Antarctic Science Ice cap Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Science Ice cap Southern Ocean |
op_source |
ISSN: 0954-1020 EISSN: 1365-2079 Antarctic Science https://hal.science/hal-04538575 Antarctic Science, 2024, pp.1-26. ⟨10.1017/S0954102023000378⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102023000378 hal-04538575 https://hal.science/hal-04538575 doi:10.1017/S0954102023000378 |
op_doi |
https://doi.org/10.1017/S0954102023000378 |
container_title |
Antarctic Science |
container_start_page |
1 |
op_container_end_page |
26 |
_version_ |
1798843334876200960 |