An age scale for new climate records from Sherman Island, West Antarctica
<jats:p>Abstract. Few ice cores from the Amundsen Sea and Bellingshausen Sea sectors of the West Antarctic Ice Sheet (WAIS) extend back in time further than a few hundred years. The WAIS is believed to be susceptible to collapse as a result of anthropogenic climate change and may have at least...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/355654 2024-01-14T09:58:31+01:00 An age scale for new climate records from Sherman Island, West Antarctica Rowell, I Martin, C Mulvaney, R Pryer, H Tetzner, D Doyle, E Talasila, HM Li, J Wolff, E 2023 application/pdf https://www.repository.cam.ac.uk/handle/1810/355654 eng eng Copernicus GmbH Department of Earth Sciences http://dx.doi.org/10.5194/cp-19-1699-2023 Climate of the Past https://www.repository.cam.ac.uk/handle/1810/355654 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Article 2023 ftunivcam 2023-12-21T23:22:30Z <jats:p>Abstract. Few ice cores from the Amundsen Sea and Bellingshausen Sea sectors of the West Antarctic Ice Sheet (WAIS) extend back in time further than a few hundred years. The WAIS is believed to be susceptible to collapse as a result of anthropogenic climate change and may have at least partially collapsed during the Last Interglacial (LIG) period. Understanding the stability of the WAIS during warm periods such as the LIG and Holocene is important. As part of the WACSWAIN (WArm Climate Stability of the West Antarctic ice sheet in the last INterglacial) project, the British Antarctic Survey's (BAS) Rapid Access Isotope Drill (RAID) was deployed in 2020 on Sherman Island in the Abbot Ice Shelf, West Antarctica. We drilled a 323 m deep borehole, with discrete samples of ice chippings collected that cover the entire depth range of the drilled ice. The samples were analysed for stable water isotope composition and major ion content at BAS from 2020–2022. Using annual layer counting of chemical records, volcanic horizon identification and ice modelling, an age scale for the record of 1724 discrete samples is presented. The Sherman Island ice record extends back to greater than 1240 years, providing the oldest, continuous ice-derived palaeoclimate records in the coastal Amundsen and Bellingshausen Sea sectors to date. We demonstrate the potential for recovery of a complete Holocene climate record from Sherman Island in the future and confidence in the ability of RAID samples to contain sufficiently resolved records for meaningful climatic interpretation. </jats:p> Article in Journal/Newspaper Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica Apollo - University of Cambridge Repository Abbot Ice Shelf ENVELOPE(-96.000,-96.000,-72.750,-72.750) Amundsen Sea Antarctic Bellingshausen Sea Sherman Island ENVELOPE(-100.000,-100.000,-73.050,-73.050) West Antarctic Ice Sheet West Antarctica |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Rowell, I Martin, C Mulvaney, R Pryer, H Tetzner, D Doyle, E Talasila, HM Li, J Wolff, E An age scale for new climate records from Sherman Island, West Antarctica |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
description |
<jats:p>Abstract. Few ice cores from the Amundsen Sea and Bellingshausen Sea sectors of the West Antarctic Ice Sheet (WAIS) extend back in time further than a few hundred years. The WAIS is believed to be susceptible to collapse as a result of anthropogenic climate change and may have at least partially collapsed during the Last Interglacial (LIG) period. Understanding the stability of the WAIS during warm periods such as the LIG and Holocene is important. As part of the WACSWAIN (WArm Climate Stability of the West Antarctic ice sheet in the last INterglacial) project, the British Antarctic Survey's (BAS) Rapid Access Isotope Drill (RAID) was deployed in 2020 on Sherman Island in the Abbot Ice Shelf, West Antarctica. We drilled a 323 m deep borehole, with discrete samples of ice chippings collected that cover the entire depth range of the drilled ice. The samples were analysed for stable water isotope composition and major ion content at BAS from 2020–2022. Using annual layer counting of chemical records, volcanic horizon identification and ice modelling, an age scale for the record of 1724 discrete samples is presented. The Sherman Island ice record extends back to greater than 1240 years, providing the oldest, continuous ice-derived palaeoclimate records in the coastal Amundsen and Bellingshausen Sea sectors to date. We demonstrate the potential for recovery of a complete Holocene climate record from Sherman Island in the future and confidence in the ability of RAID samples to contain sufficiently resolved records for meaningful climatic interpretation. </jats:p> |
format |
Article in Journal/Newspaper |
author |
Rowell, I Martin, C Mulvaney, R Pryer, H Tetzner, D Doyle, E Talasila, HM Li, J Wolff, E |
author_facet |
Rowell, I Martin, C Mulvaney, R Pryer, H Tetzner, D Doyle, E Talasila, HM Li, J Wolff, E |
author_sort |
Rowell, I |
title |
An age scale for new climate records from Sherman Island, West Antarctica |
title_short |
An age scale for new climate records from Sherman Island, West Antarctica |
title_full |
An age scale for new climate records from Sherman Island, West Antarctica |
title_fullStr |
An age scale for new climate records from Sherman Island, West Antarctica |
title_full_unstemmed |
An age scale for new climate records from Sherman Island, West Antarctica |
title_sort |
age scale for new climate records from sherman island, west antarctica |
publisher |
Copernicus GmbH |
publishDate |
2023 |
url |
https://www.repository.cam.ac.uk/handle/1810/355654 |
long_lat |
ENVELOPE(-96.000,-96.000,-72.750,-72.750) ENVELOPE(-100.000,-100.000,-73.050,-73.050) |
geographic |
Abbot Ice Shelf Amundsen Sea Antarctic Bellingshausen Sea Sherman Island West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Abbot Ice Shelf Amundsen Sea Antarctic Bellingshausen Sea Sherman Island West Antarctic Ice Sheet West Antarctica |
genre |
Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica |
genre_facet |
Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/355654 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1788056432511287296 |