Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements
The Svalbard-Barents ice sheet was predominantly a marine-based ice sheet and reconstructing the timing and rate of its decay during the last deglaciation can inform predictions of future decay of marine-based ice sheets (e.g. West Antarctica). Records of ice-sheet change are now routinely built wit...
Published in: | Journal of Quaternary Science |
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ftuglasgow:oai:eprints.gla.ac.uk:163991 2023-05-15T13:52:18+02:00 Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements Young, Nicolás E. Lamp, Jennifer Koffman, Toby Briner, Jason P. Schaefer, Joerg Gjermundsen, Endre F. Linge, Henriette Zimmerman, Susan Guilderson, Thomas P. Fabel, Derek Hormes, Anne 2018-10 text http://eprints.gla.ac.uk/163991/ http://eprints.gla.ac.uk/163991/7/163991.pdf en eng Wiley http://eprints.gla.ac.uk/163991/7/163991.pdf Young, N. E. et al. (2018) Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements. Journal of Quaternary Science <http://eprints.gla.ac.uk/view/journal_volume/Journal_of_Quaternary_Science.html>, 33(7), pp. 763-776. (doi:10.1002/jqs.3058 <http://dx.doi.org/10.1002/jqs.3058>) Articles PeerReviewed 2018 ftuglasgow https://doi.org/10.1002/jqs.3058 2020-01-10T01:40:51Z The Svalbard-Barents ice sheet was predominantly a marine-based ice sheet and reconstructing the timing and rate of its decay during the last deglaciation can inform predictions of future decay of marine-based ice sheets (e.g. West Antarctica). Records of ice-sheet change are now routinely built with cosmogenic surface exposure ages, but in some regions, this method is complicated by the presence of isotopic inheritance yielding artificially old and erroneous exposure ages. Here, we present forty-six 1025 Be ages from bedrock (n = 38) and erratic boulders (n = 8) in southwestern Spitsbergen that, when paired with in situ 1427 C measurements (n = 5), constrain the timing of coastal deglaciation following the last glacial maximum. 10Be and 1428 C measurements from bedrock along a ~400 m elevation transect reveal inheritance-skewed 10Be ages, whereas 1429 C measurements constrain 400 m of ice-sheet thinning and coastal deglaciation at 17.4 ± 1.5 ka. Combined with three additional 10Be-dated coastal sites, we show that the southwestern margin of the Svalbard-Barents ice sheet retreated out of Norwegian Sea between ~18-16 ka. In situ 1432 C measurements can provide key chronological information on ice-sheet response to the last termination in cases where measurements of long-lived nuclides are compromised by isotopic inheritance. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Norwegian Sea Svalbard West Antarctica Spitsbergen University of Glasgow: Enlighten - Publications Norwegian Sea Svalbard West Antarctica Journal of Quaternary Science 33 7 763 776 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
description |
The Svalbard-Barents ice sheet was predominantly a marine-based ice sheet and reconstructing the timing and rate of its decay during the last deglaciation can inform predictions of future decay of marine-based ice sheets (e.g. West Antarctica). Records of ice-sheet change are now routinely built with cosmogenic surface exposure ages, but in some regions, this method is complicated by the presence of isotopic inheritance yielding artificially old and erroneous exposure ages. Here, we present forty-six 1025 Be ages from bedrock (n = 38) and erratic boulders (n = 8) in southwestern Spitsbergen that, when paired with in situ 1427 C measurements (n = 5), constrain the timing of coastal deglaciation following the last glacial maximum. 10Be and 1428 C measurements from bedrock along a ~400 m elevation transect reveal inheritance-skewed 10Be ages, whereas 1429 C measurements constrain 400 m of ice-sheet thinning and coastal deglaciation at 17.4 ± 1.5 ka. Combined with three additional 10Be-dated coastal sites, we show that the southwestern margin of the Svalbard-Barents ice sheet retreated out of Norwegian Sea between ~18-16 ka. In situ 1432 C measurements can provide key chronological information on ice-sheet response to the last termination in cases where measurements of long-lived nuclides are compromised by isotopic inheritance. |
format |
Article in Journal/Newspaper |
author |
Young, Nicolás E. Lamp, Jennifer Koffman, Toby Briner, Jason P. Schaefer, Joerg Gjermundsen, Endre F. Linge, Henriette Zimmerman, Susan Guilderson, Thomas P. Fabel, Derek Hormes, Anne |
spellingShingle |
Young, Nicolás E. Lamp, Jennifer Koffman, Toby Briner, Jason P. Schaefer, Joerg Gjermundsen, Endre F. Linge, Henriette Zimmerman, Susan Guilderson, Thomas P. Fabel, Derek Hormes, Anne Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements |
author_facet |
Young, Nicolás E. Lamp, Jennifer Koffman, Toby Briner, Jason P. Schaefer, Joerg Gjermundsen, Endre F. Linge, Henriette Zimmerman, Susan Guilderson, Thomas P. Fabel, Derek Hormes, Anne |
author_sort |
Young, Nicolás E. |
title |
Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements |
title_short |
Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements |
title_full |
Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements |
title_fullStr |
Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements |
title_full_unstemmed |
Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements |
title_sort |
deglaciation of coastal south-western spitsbergen dated with in situ cosmogenic 10be and 14c measurements |
publisher |
Wiley |
publishDate |
2018 |
url |
http://eprints.gla.ac.uk/163991/ http://eprints.gla.ac.uk/163991/7/163991.pdf |
geographic |
Norwegian Sea Svalbard West Antarctica |
geographic_facet |
Norwegian Sea Svalbard West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Norwegian Sea Svalbard West Antarctica Spitsbergen |
genre_facet |
Antarc* Antarctica Ice Sheet Norwegian Sea Svalbard West Antarctica Spitsbergen |
op_relation |
http://eprints.gla.ac.uk/163991/7/163991.pdf Young, N. E. et al. (2018) Deglaciation of coastal south-western Spitsbergen dated with in situ cosmogenic 10Be and 14C measurements. Journal of Quaternary Science <http://eprints.gla.ac.uk/view/journal_volume/Journal_of_Quaternary_Science.html>, 33(7), pp. 763-776. (doi:10.1002/jqs.3058 <http://dx.doi.org/10.1002/jqs.3058>) |
op_doi |
https://doi.org/10.1002/jqs.3058 |
container_title |
Journal of Quaternary Science |
container_volume |
33 |
container_issue |
7 |
container_start_page |
763 |
op_container_end_page |
776 |
_version_ |
1766256588465635328 |