Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range
The Amundsen Sea Embayment of West Antarctica hosts one of the most rapidly changing sectors of the West Antarctic Ice Sheet. With the fastest-flowing ice streams in Antarctica, the region around Pine Island Bay is characterized by rapid ice-sheet thinning and grounding-line retreat. Published surfa...
Published in: | Quaternary Science Reviews |
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ftnerc:oai:nora.nerc.ac.uk:507825 2023-05-15T13:23:43+02:00 Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range Lindow, Julia Castex, Marion Wittmann, Hella Johnson, Joanne S. Lisker, Frank Gohl, Karsten Spiegel, Cornelia 2014-08-15 text http://nora.nerc.ac.uk/id/eprint/507825/ https://nora.nerc.ac.uk/id/eprint/507825/1/JLindow_submitted_revised_Manuscript_120514.docx https://doi.org/10.1016/j.quascirev.2014.05.010 en eng Elsevier https://nora.nerc.ac.uk/id/eprint/507825/1/JLindow_submitted_revised_Manuscript_120514.docx Lindow, Julia; Castex, Marion; Wittmann, Hella; Johnson, Joanne S. orcid:0000-0003-4537-4447 Lisker, Frank; Gohl, Karsten; Spiegel, Cornelia. 2014 Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range. Quaternary Science Reviews, 98. 166-173. https://doi.org/10.1016/j.quascirev.2014.05.010 <https://doi.org/10.1016/j.quascirev.2014.05.010> Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.1016/j.quascirev.2014.05.010 2023-02-04T19:40:00Z The Amundsen Sea Embayment of West Antarctica hosts one of the most rapidly changing sectors of the West Antarctic Ice Sheet. With the fastest-flowing ice streams in Antarctica, the region around Pine Island Bay is characterized by rapid ice-sheet thinning and grounding-line retreat. Published surface-exposure data are limited to a few isolated nunataks making it difficult to assess the long-term deglacial history of the area. To address this, we correlate existing records of lateral ice-stream retreat from marine sediment cores with onshore glacial thinning in two key areas of eastern Marie Byrd Land: the Kohler Range and Pine Island Bay. Our 10Be surface-exposure ages are the first from the isolated Kohler Range and show that the nunataks there became ice-free between 8.6 and 12.6 ka. This implies a minimum long-term average thinning rate of 3.3 ± 0.3 cm/yr, which is one order of magnitude lower than recent rates based on satellite data. We also present pre- to early Holocene 10Be surface-exposure ages from two islands located approximately 80 km downstream of the Pine Island Glacier ice-shelf front to constrain the lateral deglacial history in the Pine Island Bay area. This study provides insight into the significance of local ice sheet variations and suggests that the post-LGM history in the Amundsen Sea sector was characterized by glacial thinning as well as lateral retreat in pre- to early Holocene times. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Marie Byrd Land Pine Island Pine Island Bay Pine Island Glacier West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Byrd Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Kohler Range ENVELOPE(-111.500,-111.500,-75.700,-75.700) Quaternary Science Reviews 98 166 173 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Amundsen Sea Embayment of West Antarctica hosts one of the most rapidly changing sectors of the West Antarctic Ice Sheet. With the fastest-flowing ice streams in Antarctica, the region around Pine Island Bay is characterized by rapid ice-sheet thinning and grounding-line retreat. Published surface-exposure data are limited to a few isolated nunataks making it difficult to assess the long-term deglacial history of the area. To address this, we correlate existing records of lateral ice-stream retreat from marine sediment cores with onshore glacial thinning in two key areas of eastern Marie Byrd Land: the Kohler Range and Pine Island Bay. Our 10Be surface-exposure ages are the first from the isolated Kohler Range and show that the nunataks there became ice-free between 8.6 and 12.6 ka. This implies a minimum long-term average thinning rate of 3.3 ± 0.3 cm/yr, which is one order of magnitude lower than recent rates based on satellite data. We also present pre- to early Holocene 10Be surface-exposure ages from two islands located approximately 80 km downstream of the Pine Island Glacier ice-shelf front to constrain the lateral deglacial history in the Pine Island Bay area. This study provides insight into the significance of local ice sheet variations and suggests that the post-LGM history in the Amundsen Sea sector was characterized by glacial thinning as well as lateral retreat in pre- to early Holocene times. |
format |
Article in Journal/Newspaper |
author |
Lindow, Julia Castex, Marion Wittmann, Hella Johnson, Joanne S. Lisker, Frank Gohl, Karsten Spiegel, Cornelia |
spellingShingle |
Lindow, Julia Castex, Marion Wittmann, Hella Johnson, Joanne S. Lisker, Frank Gohl, Karsten Spiegel, Cornelia Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range |
author_facet |
Lindow, Julia Castex, Marion Wittmann, Hella Johnson, Joanne S. Lisker, Frank Gohl, Karsten Spiegel, Cornelia |
author_sort |
Lindow, Julia |
title |
Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range |
title_short |
Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range |
title_full |
Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range |
title_fullStr |
Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range |
title_full_unstemmed |
Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range |
title_sort |
glacial retreat in the amundsen sea sector, west antarctica – first cosmogenic evidence from central pine island bay and the kohler range |
publisher |
Elsevier |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/507825/ https://nora.nerc.ac.uk/id/eprint/507825/1/JLindow_submitted_revised_Manuscript_120514.docx https://doi.org/10.1016/j.quascirev.2014.05.010 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) ENVELOPE(-111.500,-111.500,-75.700,-75.700) |
geographic |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Byrd Pine Island Glacier Marie Byrd Land Island Bay Pine Island Bay Kohler Range |
geographic_facet |
Antarctic West Antarctica Amundsen Sea West Antarctic Ice Sheet Byrd Pine Island Glacier Marie Byrd Land Island Bay Pine Island Bay Kohler Range |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Marie Byrd Land Pine Island Pine Island Bay Pine Island Glacier West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Marie Byrd Land Pine Island Pine Island Bay Pine Island Glacier West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/507825/1/JLindow_submitted_revised_Manuscript_120514.docx Lindow, Julia; Castex, Marion; Wittmann, Hella; Johnson, Joanne S. orcid:0000-0003-4537-4447 Lisker, Frank; Gohl, Karsten; Spiegel, Cornelia. 2014 Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range. Quaternary Science Reviews, 98. 166-173. https://doi.org/10.1016/j.quascirev.2014.05.010 <https://doi.org/10.1016/j.quascirev.2014.05.010> |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.05.010 |
container_title |
Quaternary Science Reviews |
container_volume |
98 |
container_start_page |
166 |
op_container_end_page |
173 |
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1766374436024352768 |