Ocean as the main driver of Antarctic ice sheet retreat during the Holocene
International audience Ocean-driven basal melting has been shown to be the main ablation process responsible for the recession of many Antarctic ice shelves and marine-terminating glaciers over the last decades. However, much less is known about the drivers of ice shelf melt prior to the short instr...
Published in: | Global and Planetary Change |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.science/hal-02105534 https://doi.org/10.1016/j.gloplacha.2018.04.007 |
id |
ftuniversailles:oai:HAL:hal-02105534v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Crosta, Xavier Crespin, Julien Swingedouw, Didier Marti, Olivier Masson-Delmotte, Valérie Etourneau, Johan Goosse, Hugues Braconnot, Pascale Yam, Ruth Brailovski, Irena Shemesh, Aldo Ocean as the main driver of Antarctic ice sheet retreat during the Holocene |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Ocean-driven basal melting has been shown to be the main ablation process responsible for the recession of many Antarctic ice shelves and marine-terminating glaciers over the last decades. However, much less is known about the drivers of ice shelf melt prior to the short instrumental era. Based on diatom oxygen isotope (δ18Odiatom; a proxy for glacial ice discharge in solid or liquid form) records from western Antarctic Peninsula (West Antarctica) and Adélie Land (East Antarctica), higher ocean temperatures were suggested to have been the main driver of enhanced ice melt during the Early-to-Mid Holocene while atmosphere temperatures were proposed to have been the main driver during the Late Holocene. Here, we present a new Holocene δ18Odiatom record from Prydz Bay, East Antarctica, also suggesting an increase in glacial ice discharge since ~4500 years before present (~4.5 kyr BP) as previously observed in Antarctic Peninsula and Adélie Land. Similar results from three different regions around Antarctica thus suggest common driving mechanisms. Combining marine and ice core records along with new transient accelerated simulations from the IPSL-CM5A-LR climate model, we rule out changes in air temperatures during the last ~4.5 kyr as the main driver of enhanced glacial ice discharge. Conversely, our simulations evidence the potential for significant warmer subsurface waters in the Southern Ocean during the last 6 kyr in response to enhanced summer insolation south of 60°S and enhanced upwelling of Circumpolar Deep Water towards the Antarctic shelf. We conclude that ice front and basal melting may have played a dominant role in glacial discharge during the Late Holocene. |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Department of Earth and Planetary Sciences Rehovot Weizmann Institute of Science Rehovot, Israël Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Instituto Andaluz de Ciencias de la Tierra (IACT) Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Universidad de Granada = University of Granada (UGR) Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR) Université Catholique de Louvain = Catholic University of Louvain (UCL) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Department of Environmental Sciences and Energy Research Rehovot |
format |
Article in Journal/Newspaper |
author |
Crosta, Xavier Crespin, Julien Swingedouw, Didier Marti, Olivier Masson-Delmotte, Valérie Etourneau, Johan Goosse, Hugues Braconnot, Pascale Yam, Ruth Brailovski, Irena Shemesh, Aldo |
author_facet |
Crosta, Xavier Crespin, Julien Swingedouw, Didier Marti, Olivier Masson-Delmotte, Valérie Etourneau, Johan Goosse, Hugues Braconnot, Pascale Yam, Ruth Brailovski, Irena Shemesh, Aldo |
author_sort |
Crosta, Xavier |
title |
Ocean as the main driver of Antarctic ice sheet retreat during the Holocene |
title_short |
Ocean as the main driver of Antarctic ice sheet retreat during the Holocene |
title_full |
Ocean as the main driver of Antarctic ice sheet retreat during the Holocene |
title_fullStr |
Ocean as the main driver of Antarctic ice sheet retreat during the Holocene |
title_full_unstemmed |
Ocean as the main driver of Antarctic ice sheet retreat during the Holocene |
title_sort |
ocean as the main driver of antarctic ice sheet retreat during the holocene |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02105534 https://doi.org/10.1016/j.gloplacha.2018.04.007 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core Ice Sheet Ice Shelf Ice Shelves Prydz Bay Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core Ice Sheet Ice Shelf Ice Shelves Prydz Bay Southern Ocean West Antarctica |
op_source |
ISSN: 0921-8181 Global and Planetary Change https://hal.science/hal-02105534 Global and Planetary Change, 2018, 166, pp.62-74. ⟨10.1016/j.gloplacha.2018.04.007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2018.04.007 hal-02105534 https://hal.science/hal-02105534 doi:10.1016/j.gloplacha.2018.04.007 WOS: 000435624000006 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2018.04.007 |
container_title |
Global and Planetary Change |
container_volume |
166 |
container_start_page |
62 |
op_container_end_page |
74 |
_version_ |
1799488131877044224 |
spelling |
ftuniversailles:oai:HAL:hal-02105534v1 2024-05-19T07:30:38+00:00 Ocean as the main driver of Antarctic ice sheet retreat during the Holocene Crosta, Xavier Crespin, Julien Swingedouw, Didier Marti, Olivier Masson-Delmotte, Valérie Etourneau, Johan Goosse, Hugues Braconnot, Pascale Yam, Ruth Brailovski, Irena Shemesh, Aldo Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Department of Earth and Planetary Sciences Rehovot Weizmann Institute of Science Rehovot, Israël Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Instituto Andaluz de Ciencias de la Tierra (IACT) Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Universidad de Granada = University of Granada (UGR) Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR) Université Catholique de Louvain = Catholic University of Louvain (UCL) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Department of Environmental Sciences and Energy Research Rehovot 2018 https://hal.science/hal-02105534 https://doi.org/10.1016/j.gloplacha.2018.04.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2018.04.007 hal-02105534 https://hal.science/hal-02105534 doi:10.1016/j.gloplacha.2018.04.007 WOS: 000435624000006 ISSN: 0921-8181 Global and Planetary Change https://hal.science/hal-02105534 Global and Planetary Change, 2018, 166, pp.62-74. ⟨10.1016/j.gloplacha.2018.04.007⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2018 ftuniversailles https://doi.org/10.1016/j.gloplacha.2018.04.007 2024-04-25T00:31:52Z International audience Ocean-driven basal melting has been shown to be the main ablation process responsible for the recession of many Antarctic ice shelves and marine-terminating glaciers over the last decades. However, much less is known about the drivers of ice shelf melt prior to the short instrumental era. Based on diatom oxygen isotope (δ18Odiatom; a proxy for glacial ice discharge in solid or liquid form) records from western Antarctic Peninsula (West Antarctica) and Adélie Land (East Antarctica), higher ocean temperatures were suggested to have been the main driver of enhanced ice melt during the Early-to-Mid Holocene while atmosphere temperatures were proposed to have been the main driver during the Late Holocene. Here, we present a new Holocene δ18Odiatom record from Prydz Bay, East Antarctica, also suggesting an increase in glacial ice discharge since ~4500 years before present (~4.5 kyr BP) as previously observed in Antarctic Peninsula and Adélie Land. Similar results from three different regions around Antarctica thus suggest common driving mechanisms. Combining marine and ice core records along with new transient accelerated simulations from the IPSL-CM5A-LR climate model, we rule out changes in air temperatures during the last ~4.5 kyr as the main driver of enhanced glacial ice discharge. Conversely, our simulations evidence the potential for significant warmer subsurface waters in the Southern Ocean during the last 6 kyr in response to enhanced summer insolation south of 60°S and enhanced upwelling of Circumpolar Deep Water towards the Antarctic shelf. We conclude that ice front and basal melting may have played a dominant role in glacial discharge during the Late Holocene. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core Ice Sheet Ice Shelf Ice Shelves Prydz Bay Southern Ocean West Antarctica Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Global and Planetary Change 166 62 74 |