An age scale for new climate records from Sherman Island, West Antarctica
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 dur...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-19-1699-2023 https://cp.copernicus.org/articles/19/1699/2023/ |
id |
ftcopernicus:oai:publications.copernicus.org:cp108457 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:cp108457 2023-09-05T13:11:03+02:00 An age scale for new climate records from Sherman Island, West Antarctica Rowell, Isobel Martin, Carlos Mulvaney, Robert Pryer, Helena Tetzner, Dieter Doyle, Emily Talasila, Hara Madhav Li, Jilu Wolff, Eric 2023-08-17 application/pdf https://doi.org/10.5194/cp-19-1699-2023 https://cp.copernicus.org/articles/19/1699/2023/ eng eng doi:10.5194/cp-19-1699-2023 https://cp.copernicus.org/articles/19/1699/2023/ eISSN: 1814-9332 Text 2023 ftcopernicus https://doi.org/10.5194/cp-19-1699-2023 2023-08-21T16:24:14Z 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. Text Abbot Ice Shelf Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Ice Sheet Ice Shelf Sherman Island West Antarctica Copernicus Publications: E-Journals Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Bellingshausen Sea Sherman Island ENVELOPE(-100.000,-100.000,-73.050,-73.050) Abbot Ice Shelf ENVELOPE(-96.000,-96.000,-72.750,-72.750) Climate of the Past 19 8 1699 1714 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
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. |
format |
Text |
author |
Rowell, Isobel Martin, Carlos Mulvaney, Robert Pryer, Helena Tetzner, Dieter Doyle, Emily Talasila, Hara Madhav Li, Jilu Wolff, Eric |
spellingShingle |
Rowell, Isobel Martin, Carlos Mulvaney, Robert Pryer, Helena Tetzner, Dieter Doyle, Emily Talasila, Hara Madhav Li, Jilu Wolff, Eric An age scale for new climate records from Sherman Island, West Antarctica |
author_facet |
Rowell, Isobel Martin, Carlos Mulvaney, Robert Pryer, Helena Tetzner, Dieter Doyle, Emily Talasila, Hara Madhav Li, Jilu 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 |
2023 |
url |
https://doi.org/10.5194/cp-19-1699-2023 https://cp.copernicus.org/articles/19/1699/2023/ |
long_lat |
ENVELOPE(-100.000,-100.000,-73.050,-73.050) ENVELOPE(-96.000,-96.000,-72.750,-72.750) |
geographic |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Bellingshausen Sea Sherman Island Abbot Ice Shelf |
geographic_facet |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Bellingshausen Sea Sherman Island Abbot Ice Shelf |
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_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-19-1699-2023 https://cp.copernicus.org/articles/19/1699/2023/ |
op_doi |
https://doi.org/10.5194/cp-19-1699-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
8 |
container_start_page |
1699 |
op_container_end_page |
1714 |
_version_ |
1776198424242159616 |