Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka)
International audience Antarctic sea ice forms a critical part of the Southern Ocean and global climate system. The behaviour of Antarctic sea ice throughout the last glacial-interglacial (G-IG) cycle (12 000-130 000 years) allows us to investigate the interactions between sea ice and climate under...
Published in: | Climate of the Past |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://cnrs.hal.science/hal-03759476 https://cnrs.hal.science/hal-03759476/document https://cnrs.hal.science/hal-03759476/file/Chadwick_CP2022b.pdf https://doi.org/10.5194/cp-18-1815-2022 |
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ftinsu:oai:HAL:hal-03759476v1 2023-06-18T03:37:46+02:00 Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) Chadwick, Matthew Crosta, Xavier Esper, Oliver Thöle, Lena Kohfeld, Karen 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) 2022-08-10 https://cnrs.hal.science/hal-03759476 https://cnrs.hal.science/hal-03759476/document https://cnrs.hal.science/hal-03759476/file/Chadwick_CP2022b.pdf https://doi.org/10.5194/cp-18-1815-2022 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-18-1815-2022 hal-03759476 https://cnrs.hal.science/hal-03759476 https://cnrs.hal.science/hal-03759476/document https://cnrs.hal.science/hal-03759476/file/Chadwick_CP2022b.pdf doi:10.5194/cp-18-1815-2022 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://cnrs.hal.science/hal-03759476 Climate of the Past, 2022, 18, pp.1815 - 1829. ⟨10.5194/cp-18-1815-2022⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.5194/cp-18-1815-2022 2023-06-05T20:11:48Z International audience Antarctic sea ice forms a critical part of the Southern Ocean and global climate system. The behaviour of Antarctic sea ice throughout the last glacial-interglacial (G-IG) cycle (12 000-130 000 years) allows us to investigate the interactions between sea ice and climate under a large range of mean climate states. Understanding both temporal and spatial variations in Antarctic sea ice across a G-IG cycle is crucial to a better understanding of the G-IG regulation of atmospheric CO 2 , ocean circulation, nutrient cycling and productivity. This study presents 28 published qualitative and quantitative estimates of G-IG sea ice from 24 marine sediment cores and an Antarctic ice core. Sea ice is reconstructed from the sediment core records using diatom assemblages and from the ice core record using sea-salt sodium flux. Whilst all regions of the Southern Ocean display the same overall pattern in G-IG sea-ice variations, the magnitudes and timings vary between regions. Sea-ice cover is most sensitive to changing climate in the regions of high seaice outflow from the Weddell Sea and Ross Sea gyres, as indicated by the greatest magnitude changes in sea ice in these areas. In contrast the Scotia Sea sea-ice cover is much more resilient to moderate climatic warming, likely due to the meltwater stratification from high iceberg flux through "iceberg alley" helping to sustain high sea-ice cover outside of full glacial intervals. The differing sensitivities of sea ice to climatic shifts between different regions of the Southern Ocean has important implications for the spatial pattern of nutrient supply and primary productivity, which subsequently impact carbon uptake and atmospheric CO 2 concentrations changes across a G-IG cycle. Article in Journal/Newspaper Antarc* Antarctic ice core Iceberg* Ross Sea Scotia Sea Sea ice Southern Ocean Weddell Sea Institut national des sciences de l'Univers: HAL-INSU Antarctic Ross Sea Scotia Sea Southern Ocean Weddell Weddell Sea Climate of the Past 18 8 1815 1829 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Chadwick, Matthew Crosta, Xavier Esper, Oliver Thöle, Lena Kohfeld, Karen Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Antarctic sea ice forms a critical part of the Southern Ocean and global climate system. The behaviour of Antarctic sea ice throughout the last glacial-interglacial (G-IG) cycle (12 000-130 000 years) allows us to investigate the interactions between sea ice and climate under a large range of mean climate states. Understanding both temporal and spatial variations in Antarctic sea ice across a G-IG cycle is crucial to a better understanding of the G-IG regulation of atmospheric CO 2 , ocean circulation, nutrient cycling and productivity. This study presents 28 published qualitative and quantitative estimates of G-IG sea ice from 24 marine sediment cores and an Antarctic ice core. Sea ice is reconstructed from the sediment core records using diatom assemblages and from the ice core record using sea-salt sodium flux. Whilst all regions of the Southern Ocean display the same overall pattern in G-IG sea-ice variations, the magnitudes and timings vary between regions. Sea-ice cover is most sensitive to changing climate in the regions of high seaice outflow from the Weddell Sea and Ross Sea gyres, as indicated by the greatest magnitude changes in sea ice in these areas. In contrast the Scotia Sea sea-ice cover is much more resilient to moderate climatic warming, likely due to the meltwater stratification from high iceberg flux through "iceberg alley" helping to sustain high sea-ice cover outside of full glacial intervals. The differing sensitivities of sea ice to climatic shifts between different regions of the Southern Ocean has important implications for the spatial pattern of nutrient supply and primary productivity, which subsequently impact carbon uptake and atmospheric CO 2 concentrations changes across a G-IG cycle. |
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) |
format |
Article in Journal/Newspaper |
author |
Chadwick, Matthew Crosta, Xavier Esper, Oliver Thöle, Lena Kohfeld, Karen |
author_facet |
Chadwick, Matthew Crosta, Xavier Esper, Oliver Thöle, Lena Kohfeld, Karen |
author_sort |
Chadwick, Matthew |
title |
Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
title_short |
Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
title_full |
Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
title_fullStr |
Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
title_full_unstemmed |
Compilation of Southern Ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
title_sort |
compilation of southern ocean sea-ice records covering the last glacial-interglacial cycle (12–130 ka) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://cnrs.hal.science/hal-03759476 https://cnrs.hal.science/hal-03759476/document https://cnrs.hal.science/hal-03759476/file/Chadwick_CP2022b.pdf https://doi.org/10.5194/cp-18-1815-2022 |
geographic |
Antarctic Ross Sea Scotia Sea Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Ross Sea Scotia Sea Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic ice core Iceberg* Ross Sea Scotia Sea Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic ice core Iceberg* Ross Sea Scotia Sea Sea ice Southern Ocean Weddell Sea |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://cnrs.hal.science/hal-03759476 Climate of the Past, 2022, 18, pp.1815 - 1829. ⟨10.5194/cp-18-1815-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-18-1815-2022 hal-03759476 https://cnrs.hal.science/hal-03759476 https://cnrs.hal.science/hal-03759476/document https://cnrs.hal.science/hal-03759476/file/Chadwick_CP2022b.pdf doi:10.5194/cp-18-1815-2022 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-18-1815-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
8 |
container_start_page |
1815 |
op_container_end_page |
1829 |
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1769010551564795904 |