Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum
Lake sediments retrieved from the beds of former nonerosive ice sheets offer unique possibilities to constrain changes in the extent and style of past glaciation, and place them in an absolutely dated context. We present the first pre-Holocene lake sediments from Arctic Svalbard. Radiocarbon dating...
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American Association for the Advancement of Science
2019
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Online Access: | https://hdl.handle.net/1956/22057 https://doi.org/10.1126/sciadv.aaw5980 |
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ftunivbergen:oai:bora.uib.no:1956/22057 2023-05-15T15:04:37+02:00 Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum Bilt, Willem van der Lane, Christine S. 2019-10-30T20:42:21Z application/pdf https://hdl.handle.net/1956/22057 https://doi.org/10.1126/sciadv.aaw5980 eng eng American Association for the Advancement of Science urn:issn:2375-2548 https://hdl.handle.net/1956/22057 https://doi.org/10.1126/sciadv.aaw5980 cristin:1742517 Attribution CC BY https://creativecommons.org/licenses/by/4.0 Copyright the authors Science Advances Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.1126/sciadv.aaw5980 2023-03-14T17:42:55Z Lake sediments retrieved from the beds of former nonerosive ice sheets offer unique possibilities to constrain changes in the extent and style of past glaciation, and place them in an absolutely dated context. We present the first pre-Holocene lake sediments from Arctic Svalbard. Radiocarbon dating of terrestrial plant fossils reveals that the investigated catchment was unglaciated and vegetated between 30 and 20 ka B.P. during the global Last Glacial Maximum. The presence of volcanic ash from a contemporaneous Azorean eruption also provides evidence for ice-free conditions. Indicators of sediment compaction and a depositional hiatus suggest subsequent coverage by nonerosive ice until 11 ka B.P. Comparison with regional paleoclimate data indicates that sea ice variability controlled this pattern of ice sheet evolution by modulating moisture supply. Facing rapid regional sea ice losses, our findings have implications for the future response of the Arctic’s cryosphere, a major driver of global sea-level rise. publishedVersion Article in Journal/Newspaper Arctic Ice Sheet Sea ice Svalbard Spitsbergen University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Svalbard Science Advances 5 10 eaaw5980 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Lake sediments retrieved from the beds of former nonerosive ice sheets offer unique possibilities to constrain changes in the extent and style of past glaciation, and place them in an absolutely dated context. We present the first pre-Holocene lake sediments from Arctic Svalbard. Radiocarbon dating of terrestrial plant fossils reveals that the investigated catchment was unglaciated and vegetated between 30 and 20 ka B.P. during the global Last Glacial Maximum. The presence of volcanic ash from a contemporaneous Azorean eruption also provides evidence for ice-free conditions. Indicators of sediment compaction and a depositional hiatus suggest subsequent coverage by nonerosive ice until 11 ka B.P. Comparison with regional paleoclimate data indicates that sea ice variability controlled this pattern of ice sheet evolution by modulating moisture supply. Facing rapid regional sea ice losses, our findings have implications for the future response of the Arctic’s cryosphere, a major driver of global sea-level rise. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Bilt, Willem van der Lane, Christine S. |
spellingShingle |
Bilt, Willem van der Lane, Christine S. Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum |
author_facet |
Bilt, Willem van der Lane, Christine S. |
author_sort |
Bilt, Willem van der |
title |
Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum |
title_short |
Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum |
title_full |
Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum |
title_fullStr |
Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum |
title_full_unstemmed |
Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum |
title_sort |
lake sediments with azorean tephra reveal ice-free conditions on coastal northwest spitsbergen during the last glacial maximum |
publisher |
American Association for the Advancement of Science |
publishDate |
2019 |
url |
https://hdl.handle.net/1956/22057 https://doi.org/10.1126/sciadv.aaw5980 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Ice Sheet Sea ice Svalbard Spitsbergen |
genre_facet |
Arctic Ice Sheet Sea ice Svalbard Spitsbergen |
op_source |
Science Advances |
op_relation |
urn:issn:2375-2548 https://hdl.handle.net/1956/22057 https://doi.org/10.1126/sciadv.aaw5980 cristin:1742517 |
op_rights |
Attribution CC BY https://creativecommons.org/licenses/by/4.0 Copyright the authors |
op_doi |
https://doi.org/10.1126/sciadv.aaw5980 |
container_title |
Science Advances |
container_volume |
5 |
container_issue |
10 |
container_start_page |
eaaw5980 |
_version_ |
1766336355845013504 |