Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years
International audience Dramatic changes in sea ice have been observed in both poles in recent decades. However, the observational period for sea ice is short, and the climate models tasked with predicting future change in sea ice struggle to capture the current Antarctic trends. Paleoclimate archive...
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Online Access: | https://hal.science/hal-02394971 https://hal.science/hal-02394971/document https://hal.science/hal-02394971/file/Thomas_Geosciences2019.pdf https://doi.org/10.3390/geosciences9120506 |
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ftunivnantes:oai:HAL:hal-02394971v1 2023-05-15T13:37:55+02:00 Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years Thomas, Elisabeth Allen, Claire Etourneau, Johan King, Amy Severi, Mirko Winton, Holly Mueller, Juliane Crosta, Xavier Peck, Victoria British Antarctic Survey (BAS) Natural Environment Research Council (NERC) UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (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) Università degli Studi di Firenze = University of Florence (UniFI) Alfred Wegener Institute Potsdam Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) EPOC - CNRS, UMR 5805 2019-12 https://hal.science/hal-02394971 https://hal.science/hal-02394971/document https://hal.science/hal-02394971/file/Thomas_Geosciences2019.pdf https://doi.org/10.3390/geosciences9120506 en eng HAL CCSD Geological Survey of Iran info:eu-repo/semantics/altIdentifier/doi/10.3390/geosciences9120506 hal-02394971 https://hal.science/hal-02394971 https://hal.science/hal-02394971/document https://hal.science/hal-02394971/file/Thomas_Geosciences2019.pdf doi:10.3390/geosciences9120506 info:eu-repo/semantics/OpenAccess ISSN: 1023-7429 Geosciences https://hal.science/hal-02394971 Geosciences, 2019, 9 (12), pp.506. ⟨10.3390/geosciences9120506⟩ sea ice Antarctica paleoclimate ice cores marine sediments [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 2019 ftunivnantes https://doi.org/10.3390/geosciences9120506 2023-02-08T05:10:33Z International audience Dramatic changes in sea ice have been observed in both poles in recent decades. However, the observational period for sea ice is short, and the climate models tasked with predicting future change in sea ice struggle to capture the current Antarctic trends. Paleoclimate archives, from marine sedimentary records and coastal Antarctic ice cores, provide a means of understanding sea ice variability and its drivers over decadal to centennial timescales. In this study, we collate published records of Antarctic sea ice over the past 2000 years (2 ka). We evaluate the current proxies and explore the potential of combining marine and ice core records to produce multi-archive reconstructions. Despite identifying 92 sea ice reconstructions, the spatial and temporal resolution is only sufficient to reconstruct circum-Antarctic sea ice during the 20th century, not the full 2 ka. Our synthesis reveals a 90 year trend of increasing sea ice in the Ross Sea and declining sea ice in the Bellingshausen, comparable with observed trends since 1979. Reconstructions in the Weddell Sea, the Western Pacific and the Indian Ocean reveal small negative trends in sea ice during the 20th century (1900-1990), in contrast to the observed sea ice expansion in these regions since 1979. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ross Sea Sea ice Weddell Sea Université de Nantes: HAL-UNIV-NANTES Antarctic Indian Pacific Ross Sea Weddell Weddell Sea Geosciences 9 12 506 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
sea ice Antarctica paleoclimate ice cores marine sediments [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 |
sea ice Antarctica paleoclimate ice cores marine sediments [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 Thomas, Elisabeth Allen, Claire Etourneau, Johan King, Amy Severi, Mirko Winton, Holly Mueller, Juliane Crosta, Xavier Peck, Victoria Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years |
topic_facet |
sea ice Antarctica paleoclimate ice cores marine sediments [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 Dramatic changes in sea ice have been observed in both poles in recent decades. However, the observational period for sea ice is short, and the climate models tasked with predicting future change in sea ice struggle to capture the current Antarctic trends. Paleoclimate archives, from marine sedimentary records and coastal Antarctic ice cores, provide a means of understanding sea ice variability and its drivers over decadal to centennial timescales. In this study, we collate published records of Antarctic sea ice over the past 2000 years (2 ka). We evaluate the current proxies and explore the potential of combining marine and ice core records to produce multi-archive reconstructions. Despite identifying 92 sea ice reconstructions, the spatial and temporal resolution is only sufficient to reconstruct circum-Antarctic sea ice during the 20th century, not the full 2 ka. Our synthesis reveals a 90 year trend of increasing sea ice in the Ross Sea and declining sea ice in the Bellingshausen, comparable with observed trends since 1979. Reconstructions in the Weddell Sea, the Western Pacific and the Indian Ocean reveal small negative trends in sea ice during the 20th century (1900-1990), in contrast to the observed sea ice expansion in these regions since 1979. |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux (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) Università degli Studi di Firenze = University of Florence (UniFI) Alfred Wegener Institute Potsdam Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) EPOC - CNRS, UMR 5805 |
format |
Article in Journal/Newspaper |
author |
Thomas, Elisabeth Allen, Claire Etourneau, Johan King, Amy Severi, Mirko Winton, Holly Mueller, Juliane Crosta, Xavier Peck, Victoria |
author_facet |
Thomas, Elisabeth Allen, Claire Etourneau, Johan King, Amy Severi, Mirko Winton, Holly Mueller, Juliane Crosta, Xavier Peck, Victoria |
author_sort |
Thomas, Elisabeth |
title |
Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years |
title_short |
Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years |
title_full |
Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years |
title_fullStr |
Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years |
title_full_unstemmed |
Antarctic Sea Ice Proxies from Marine and Ice Core Archives Suitable for Reconstructing Sea Ice over the past 2000 Years |
title_sort |
antarctic sea ice proxies from marine and ice core archives suitable for reconstructing sea ice over the past 2000 years |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02394971 https://hal.science/hal-02394971/document https://hal.science/hal-02394971/file/Thomas_Geosciences2019.pdf https://doi.org/10.3390/geosciences9120506 |
geographic |
Antarctic Indian Pacific Ross Sea Weddell Weddell Sea |
geographic_facet |
Antarctic Indian Pacific Ross Sea Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica ice core Ross Sea Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica ice core Ross Sea Sea ice Weddell Sea |
op_source |
ISSN: 1023-7429 Geosciences https://hal.science/hal-02394971 Geosciences, 2019, 9 (12), pp.506. ⟨10.3390/geosciences9120506⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/geosciences9120506 hal-02394971 https://hal.science/hal-02394971 https://hal.science/hal-02394971/document https://hal.science/hal-02394971/file/Thomas_Geosciences2019.pdf doi:10.3390/geosciences9120506 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/geosciences9120506 |
container_title |
Geosciences |
container_volume |
9 |
container_issue |
12 |
container_start_page |
506 |
_version_ |
1766099571949174784 |