Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e
Environmental conditions during Marine Isotope Stage (MIS) 5e (130–116 ka) represent an important ‘process analogue’ for understanding the climatic responses to present and future anthropogenic warming. The response of Antarctic sea ice to global warming is particularly uncertain due to the short le...
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fttriple:oai:gotriple.eu:10670/1.pjseth 2023-05-15T13:52:35+02:00 Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e Chadwick, Matthew Allen, Claire S. Sime, Louise C. Crosta, Xavier Hillenbrand, Claus-Dieter 2021-08-10 https://doi.org/10.5194/cp-2021-102 https://cp.copernicus.org/preprints/cp-2021-102/ en eng doi:10.5194/cp-2021-102 10670/1.pjseth https://cp.copernicus.org/preprints/cp-2021-102/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2021 fttriple https://doi.org/10.5194/cp-2021-102 2023-01-22T18:03:07Z Environmental conditions during Marine Isotope Stage (MIS) 5e (130–116 ka) represent an important ‘process analogue’ for understanding the climatic responses to present and future anthropogenic warming. The response of Antarctic sea ice to global warming is particularly uncertain due to the short length of the observational record. Reconstructing Antarctic winter sea-ice extent during MIS 5e therefore provides insights into the temporal and spatial patterns of sea-ice change under warmer than present climate. This study presents new MIS 5e records from nine marine sediment cores located south of the Antarctic Polar Front, between 55 and 70° S. We investigate changes in winter sea-ice extent and sea-surface temperatures between the three Southern Ocean sectors. The Atlantic and Indian sector records have much more variable MIS 5e winter sea-ice extent and sea-surface temperatures than the Pacific sector records. High variability in the Atlantic sector winter sea-ice extent is attributed to high glacial meltwater flux in the Weddell Sea while high variability in the Indian sector winter sea-ice extent results from large latitudinal migrations of the flow bands of the Antarctic Circumpolar Current. Overall, these findings suggest that Pacific sector winter sea ice displays a low sensitivity to warmer climates. The different variability and sensitivity of Antarctic winter sea-ice extent in the three Southern Ocean sectors during MIS 5e may have significant implications for the Southern Hemisphere climatic system under future warming. Text Antarc* Antarctic Sea ice Southern Ocean Weddell Sea Unknown Antarctic Indian Pacific Southern Ocean The Antarctic Weddell Weddell Sea |
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geo envir Chadwick, Matthew Allen, Claire S. Sime, Louise C. Crosta, Xavier Hillenbrand, Claus-Dieter Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e |
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geo envir |
description |
Environmental conditions during Marine Isotope Stage (MIS) 5e (130–116 ka) represent an important ‘process analogue’ for understanding the climatic responses to present and future anthropogenic warming. The response of Antarctic sea ice to global warming is particularly uncertain due to the short length of the observational record. Reconstructing Antarctic winter sea-ice extent during MIS 5e therefore provides insights into the temporal and spatial patterns of sea-ice change under warmer than present climate. This study presents new MIS 5e records from nine marine sediment cores located south of the Antarctic Polar Front, between 55 and 70° S. We investigate changes in winter sea-ice extent and sea-surface temperatures between the three Southern Ocean sectors. The Atlantic and Indian sector records have much more variable MIS 5e winter sea-ice extent and sea-surface temperatures than the Pacific sector records. High variability in the Atlantic sector winter sea-ice extent is attributed to high glacial meltwater flux in the Weddell Sea while high variability in the Indian sector winter sea-ice extent results from large latitudinal migrations of the flow bands of the Antarctic Circumpolar Current. Overall, these findings suggest that Pacific sector winter sea ice displays a low sensitivity to warmer climates. The different variability and sensitivity of Antarctic winter sea-ice extent in the three Southern Ocean sectors during MIS 5e may have significant implications for the Southern Hemisphere climatic system under future warming. |
format |
Text |
author |
Chadwick, Matthew Allen, Claire S. Sime, Louise C. Crosta, Xavier Hillenbrand, Claus-Dieter |
author_facet |
Chadwick, Matthew Allen, Claire S. Sime, Louise C. Crosta, Xavier Hillenbrand, Claus-Dieter |
author_sort |
Chadwick, Matthew |
title |
Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e |
title_short |
Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e |
title_full |
Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e |
title_fullStr |
Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e |
title_full_unstemmed |
Reconstructing Antarctic winter sea-ice extent during Marine Isotope Stage 5e |
title_sort |
reconstructing antarctic winter sea-ice extent during marine isotope stage 5e |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-2021-102 https://cp.copernicus.org/preprints/cp-2021-102/ |
geographic |
Antarctic Indian Pacific Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Indian Pacific Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean Weddell Sea |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-2021-102 10670/1.pjseth https://cp.copernicus.org/preprints/cp-2021-102/ |
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undefined |
op_doi |
https://doi.org/10.5194/cp-2021-102 |
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1766256999686733824 |