An age scale for new climate records from Sherman Island, West Antarctica
Few ice cores from the Amundsen 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 in the...
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ftcopernicus:oai:publications.copernicus.org:cpd108457 2023-05-15T13:38:41+02:00 An age scale for new climate records from Sherman Island, West Antarctica Rowell, Isobel Pryer, Helena Martin, Carlos Tetzner, Dieter Doyle, Emily Mulvaney, Robert Wolff, Eric 2022-12-23 application/pdf https://doi.org/10.5194/cp-2022-95 https://cp.copernicus.org/preprints/cp-2022-95/ eng eng doi:10.5194/cp-2022-95 https://cp.copernicus.org/preprints/cp-2022-95/ eISSN: 1814-9332 Text 2022 ftcopernicus https://doi.org/10.5194/cp-2022-95 2022-12-26T17:22:42Z Few ice cores from the Amundsen 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 in the past. Understanding the stability of the WAIS during warm periods such as the LIG and Holocene is important. As part of the WACSWAIN project, the British Antarctic Survey's (BAS) Rapid Access Isotope Drill (RAID) was deployed in 2020 on Sherman Island in the Abbott Ice Shelf. We drilled a 323 m deep borehole, with discrete samples of ice chippings collected covering 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 modelling, an age scale for the record of 1724 discrete samples is presented. The Sherman Island ice record extends back to greater than 1150 years before present, providing the oldest, continuous, ice-derived palaeoclimate records for the coastal Amundsen-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. Text Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica Copernicus Publications: E-Journals Abbott ENVELOPE(-62.133,-62.133,-64.100,-64.100) Antarctic Bellingshausen Sea Sherman Island ENVELOPE(-100.000,-100.000,-73.050,-73.050) West Antarctic Ice Sheet West Antarctica |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Few ice cores from the Amundsen 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 in the past. Understanding the stability of the WAIS during warm periods such as the LIG and Holocene is important. As part of the WACSWAIN project, the British Antarctic Survey's (BAS) Rapid Access Isotope Drill (RAID) was deployed in 2020 on Sherman Island in the Abbott Ice Shelf. We drilled a 323 m deep borehole, with discrete samples of ice chippings collected covering 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 modelling, an age scale for the record of 1724 discrete samples is presented. The Sherman Island ice record extends back to greater than 1150 years before present, providing the oldest, continuous, ice-derived palaeoclimate records for the coastal Amundsen-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. |
format |
Text |
author |
Rowell, Isobel Pryer, Helena Martin, Carlos Tetzner, Dieter Doyle, Emily Mulvaney, Robert Wolff, Eric |
spellingShingle |
Rowell, Isobel Pryer, Helena Martin, Carlos Tetzner, Dieter Doyle, Emily Mulvaney, Robert Wolff, Eric An age scale for new climate records from Sherman Island, West Antarctica |
author_facet |
Rowell, Isobel Pryer, Helena Martin, Carlos Tetzner, Dieter Doyle, Emily Mulvaney, Robert Wolff, Eric |
author_sort |
Rowell, Isobel |
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 |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-2022-95 https://cp.copernicus.org/preprints/cp-2022-95/ |
long_lat |
ENVELOPE(-62.133,-62.133,-64.100,-64.100) ENVELOPE(-100.000,-100.000,-73.050,-73.050) |
geographic |
Abbott Antarctic Bellingshausen Sea Sherman Island West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Abbott Antarctic Bellingshausen Sea Sherman Island West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-2022-95 https://cp.copernicus.org/preprints/cp-2022-95/ |
op_doi |
https://doi.org/10.5194/cp-2022-95 |
_version_ |
1766109728663928832 |