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...
Main Authors: | , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Apollo - University of Cambridge Repository
2019
|
Subjects: | |
Online Access: | https://dx.doi.org/10.17863/cam.46633 https://www.repository.cam.ac.uk/handle/1810/299561 |
id |
ftdatacite:10.17863/cam.46633 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.17863/cam.46633 2023-05-15T15:04:30+02:00 Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum. Van Der Bilt, Willem G M Lane, Christine S 2019 https://dx.doi.org/10.17863/cam.46633 https://www.repository.cam.ac.uk/handle/1810/299561 unknown Apollo - University of Cambridge Repository Attribution 4.0 International https://creativecommons.org/licenses/by/4.0 CC-BY Text Article article-journal ScholarlyArticle 2019 ftdatacite https://doi.org/10.17863/cam.46633 2021-11-05T12:55:41Z 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. Text Arctic Ice Sheet Sea ice Svalbard Spitsbergen DataCite Metadata Store (German National Library of Science and Technology) Arctic Svalbard |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
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. |
format |
Text |
author |
Van Der Bilt, Willem G M Lane, Christine S |
spellingShingle |
Van Der Bilt, Willem G M Lane, Christine S Lake sediments with Azorean tephra reveal ice-free conditions on coastal northwest Spitsbergen during the Last Glacial Maximum. |
author_facet |
Van Der Bilt, Willem G M Lane, Christine S |
author_sort |
Van Der Bilt, Willem G M |
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 |
Apollo - University of Cambridge Repository |
publishDate |
2019 |
url |
https://dx.doi.org/10.17863/cam.46633 https://www.repository.cam.ac.uk/handle/1810/299561 |
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_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17863/cam.46633 |
_version_ |
1766336270925037568 |