Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications
International audience The timing of neoglacial advances in the Antarctic Peninsula (AP) is not yet well constrained. Accurate temporal reconstruction of Neoglaciation in the AP is needed to better understand past glacial responses and regional and global teleconnections during the Holocene. Here, w...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-02535722 https://hal.science/hal-02535722/document https://hal.science/hal-02535722/file/Palacios%20et%20al%202019%20Byers.pdf https://doi.org/10.1016/j.quascirev.2020.106248 |
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ftunivaixmarseil:oai:HAL:hal-02535722v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
Antarctic Peninsula Byers Peninsula Neoglaciation surface exposure dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
Antarctic Peninsula Byers Peninsula Neoglaciation surface exposure dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Palacios, David Ruiz-Fernández, Jesus Oliva, Marc Andrés, Nuria Fernández-Fernández, José, M. Schimmelpfennig, Irene Léanni, Laettitia González-Díaz, Benjamín Aster, Team Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications |
topic_facet |
Antarctic Peninsula Byers Peninsula Neoglaciation surface exposure dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
International audience The timing of neoglacial advances in the Antarctic Peninsula (AP) is not yet well constrained. Accurate temporal reconstruction of Neoglaciation in the AP is needed to better understand past glacial responses and regional and global teleconnections during the Holocene. Here, we examine all available information about neoglacial advances in the South Shetland Islands (SSI) as well as in the broader geographical context of the AP region and Antarctic continent. In order to shed light on the contrasting chronologies existing for neoglacial advances in these regions, we focused on a case study where a detailed picture of the Holocene deglaciation was already available. Lake sediments revealed that Byers Peninsula, west of Livingston Island (SSI), was fully deglaciated during the Holocene Thermal Maximum. To complement this approach, we identified glacially polished bedrock surfaces, erratic boulders and a moraine ridge near the present front of the glacier in the SE corner. We applied cosmogenic ray exposure (CRE) dating using in situ 36Cl for basalt rocks and 10Be for granitic rocks in: (i) 8 samples from glacial erratic and ice-rafted boulders, (ii) 2 samples from moraine boulders, (iii) 2 samples from polished bedrock surfaces, and (iv) 1 sample from an erratic boulder deposited on one of these surfaces. The CRE dates indicate that the onset of deglaciation started around 9.9 ± 1.2 ka, with two phases of glacier expansion during the Mid-Late Holocene forming moraines at~4.1 ± 0.5 and~1.0 ± 0.2 ka, respectively. The main neoglacial advances in the AP and the SSI were mostly synchronous and coincided with cold periods, as shown by other records (e.g. glacio-isostatic marine terraces, marine and lake sediments). In addition, these periods of glacial expansion show a similar timing to those recorded in the Arctic. These results suggest that Neoglaciation was driven by global climate forcing in both polar areas despite temporal variations at regional and local scale. |
author2 |
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) |
format |
Article in Journal/Newspaper |
author |
Palacios, David Ruiz-Fernández, Jesus Oliva, Marc Andrés, Nuria Fernández-Fernández, José, M. Schimmelpfennig, Irene Léanni, Laettitia González-Díaz, Benjamín Aster, Team |
author_facet |
Palacios, David Ruiz-Fernández, Jesus Oliva, Marc Andrés, Nuria Fernández-Fernández, José, M. Schimmelpfennig, Irene Léanni, Laettitia González-Díaz, Benjamín Aster, Team |
author_sort |
Palacios, David |
title |
Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications |
title_short |
Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications |
title_full |
Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications |
title_fullStr |
Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications |
title_full_unstemmed |
Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications |
title_sort |
timing of formation of neoglacial landforms in the south shetland islands (antarctic peninsula): regional and global implications |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02535722 https://hal.science/hal-02535722/document https://hal.science/hal-02535722/file/Palacios%20et%20al%202019%20Byers.pdf https://doi.org/10.1016/j.quascirev.2020.106248 |
genre |
Antarc* Antarctic Antarctic Peninsula Arctic Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Arctic Livingston Island South Shetland Islands |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02535722 Quaternary Science Reviews, 2020, 234, ⟨10.1016/j.quascirev.2020.106248⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2020.106248 hal-02535722 https://hal.science/hal-02535722 https://hal.science/hal-02535722/document https://hal.science/hal-02535722/file/Palacios%20et%20al%202019%20Byers.pdf doi:10.1016/j.quascirev.2020.106248 WOS: 000525791800008 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106248 |
container_title |
Quaternary Science Reviews |
container_volume |
234 |
container_start_page |
106248 |
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1797572784775233536 |
spelling |
ftunivaixmarseil:oai:HAL:hal-02535722v1 2024-04-28T08:00:40+00:00 Timing of formation of neoglacial landforms in the South Shetland Islands (Antarctic Peninsula): Regional and global implications Palacios, David Ruiz-Fernández, Jesus Oliva, Marc Andrés, Nuria Fernández-Fernández, José, M. Schimmelpfennig, Irene Léanni, Laettitia González-Díaz, Benjamín Aster, Team 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) 2020-04 https://hal.science/hal-02535722 https://hal.science/hal-02535722/document https://hal.science/hal-02535722/file/Palacios%20et%20al%202019%20Byers.pdf https://doi.org/10.1016/j.quascirev.2020.106248 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2020.106248 hal-02535722 https://hal.science/hal-02535722 https://hal.science/hal-02535722/document https://hal.science/hal-02535722/file/Palacios%20et%20al%202019%20Byers.pdf doi:10.1016/j.quascirev.2020.106248 WOS: 000525791800008 info:eu-repo/semantics/OpenAccess ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02535722 Quaternary Science Reviews, 2020, 234, ⟨10.1016/j.quascirev.2020.106248⟩ Antarctic Peninsula Byers Peninsula Neoglaciation surface exposure dating [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2020 ftunivaixmarseil https://doi.org/10.1016/j.quascirev.2020.106248 2024-04-04T17:33:03Z International audience The timing of neoglacial advances in the Antarctic Peninsula (AP) is not yet well constrained. Accurate temporal reconstruction of Neoglaciation in the AP is needed to better understand past glacial responses and regional and global teleconnections during the Holocene. Here, we examine all available information about neoglacial advances in the South Shetland Islands (SSI) as well as in the broader geographical context of the AP region and Antarctic continent. In order to shed light on the contrasting chronologies existing for neoglacial advances in these regions, we focused on a case study where a detailed picture of the Holocene deglaciation was already available. Lake sediments revealed that Byers Peninsula, west of Livingston Island (SSI), was fully deglaciated during the Holocene Thermal Maximum. To complement this approach, we identified glacially polished bedrock surfaces, erratic boulders and a moraine ridge near the present front of the glacier in the SE corner. We applied cosmogenic ray exposure (CRE) dating using in situ 36Cl for basalt rocks and 10Be for granitic rocks in: (i) 8 samples from glacial erratic and ice-rafted boulders, (ii) 2 samples from moraine boulders, (iii) 2 samples from polished bedrock surfaces, and (iv) 1 sample from an erratic boulder deposited on one of these surfaces. The CRE dates indicate that the onset of deglaciation started around 9.9 ± 1.2 ka, with two phases of glacier expansion during the Mid-Late Holocene forming moraines at~4.1 ± 0.5 and~1.0 ± 0.2 ka, respectively. The main neoglacial advances in the AP and the SSI were mostly synchronous and coincided with cold periods, as shown by other records (e.g. glacio-isostatic marine terraces, marine and lake sediments). In addition, these periods of glacial expansion show a similar timing to those recorded in the Arctic. These results suggest that Neoglaciation was driven by global climate forcing in both polar areas despite temporal variations at regional and local scale. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Arctic Livingston Island South Shetland Islands Aix-Marseille Université: HAL Quaternary Science Reviews 234 106248 |