The last glaciation of the Arctic volcanic island Jan Mayen
The volcanic island of Jan Mayen, remotely located in the Norwegian-Greenland Sea, was covered by a contiguous ice cap during the Late Weichselian. Until now, it has been disputed whether parts of the island south of the presently glaciated Mount Beerenberg area were ever glaciated. Based on extensi...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/450899 2023-05-15T15:09:03+02:00 The last glaciation of the Arctic volcanic island Jan Mayen Lysa, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerod, Morgan Hiksdal, Asbjorn Van der Lelij, Roelant Vockenhuber, Christof 2021-01 application/application/pdf https://hdl.handle.net/20.500.11850/450899 https://doi.org/10.3929/ethz-b-000450899 en eng Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/bor.12482 info:eu-repo/semantics/altIdentifier/wos/000583192900001 http://hdl.handle.net/20.500.11850/450899 doi:10.3929/ethz-b-000450899 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International CC-BY-NC-ND Boreas, 50 (1) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftethz https://doi.org/20.500.11850/450899 https://doi.org/10.3929/ethz-b-000450899 https://doi.org/10.1111/bor.12482 2022-04-25T14:20:19Z The volcanic island of Jan Mayen, remotely located in the Norwegian-Greenland Sea, was covered by a contiguous ice cap during the Late Weichselian. Until now, it has been disputed whether parts of the island south of the presently glaciated Mount Beerenberg area were ever glaciated. Based on extensive field mapping we demonstrate that an ice cap covered all land areas and likely also extended onto the shallow shelf areas southeast and east of the island. Chronological interpretations are based on K-Ar and Ar-40/Ar-39 dating of volcanic rocks, cosmogenic nuclide (Cl-36) surface exposure dating of bedrock and glacial erratics, and radiocarbon dating. We argue that ice growth started after 34 ka and that an initial deglaciation started some 21.5-19.5 ka in the southern and middle parts of the island. In the northern parts, closer to the present glaciers, the deglaciation might have started later, as evidenced by the establishment of vegetation 17-16 cal. ka BP. During full glaciation, the ice cap was likely thickest over the southern part of the island. This may explain a seemingly delayed deglaciation compared with the northern parts despite earlier initial deglaciation. In a broader context, the new knowledge of the Late Weichselian of the island contributes to the understanding of glaciations surrounding the North Atlantic and its climate history. ISSN:0300-9483 ISSN:1502-3885 Article in Journal/Newspaper Arctic Greenland Greenland Sea Ice cap Jan Mayen North Atlantic ETH Zürich Research Collection Arctic Beerenberg ENVELOPE(-8.167,-8.167,71.083,71.083) Greenland Jan Mayen |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
description |
The volcanic island of Jan Mayen, remotely located in the Norwegian-Greenland Sea, was covered by a contiguous ice cap during the Late Weichselian. Until now, it has been disputed whether parts of the island south of the presently glaciated Mount Beerenberg area were ever glaciated. Based on extensive field mapping we demonstrate that an ice cap covered all land areas and likely also extended onto the shallow shelf areas southeast and east of the island. Chronological interpretations are based on K-Ar and Ar-40/Ar-39 dating of volcanic rocks, cosmogenic nuclide (Cl-36) surface exposure dating of bedrock and glacial erratics, and radiocarbon dating. We argue that ice growth started after 34 ka and that an initial deglaciation started some 21.5-19.5 ka in the southern and middle parts of the island. In the northern parts, closer to the present glaciers, the deglaciation might have started later, as evidenced by the establishment of vegetation 17-16 cal. ka BP. During full glaciation, the ice cap was likely thickest over the southern part of the island. This may explain a seemingly delayed deglaciation compared with the northern parts despite earlier initial deglaciation. In a broader context, the new knowledge of the Late Weichselian of the island contributes to the understanding of glaciations surrounding the North Atlantic and its climate history. ISSN:0300-9483 ISSN:1502-3885 |
format |
Article in Journal/Newspaper |
author |
Lysa, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerod, Morgan Hiksdal, Asbjorn Van der Lelij, Roelant Vockenhuber, Christof |
spellingShingle |
Lysa, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerod, Morgan Hiksdal, Asbjorn Van der Lelij, Roelant Vockenhuber, Christof The last glaciation of the Arctic volcanic island Jan Mayen |
author_facet |
Lysa, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerod, Morgan Hiksdal, Asbjorn Van der Lelij, Roelant Vockenhuber, Christof |
author_sort |
Lysa, Astrid |
title |
The last glaciation of the Arctic volcanic island Jan Mayen |
title_short |
The last glaciation of the Arctic volcanic island Jan Mayen |
title_full |
The last glaciation of the Arctic volcanic island Jan Mayen |
title_fullStr |
The last glaciation of the Arctic volcanic island Jan Mayen |
title_full_unstemmed |
The last glaciation of the Arctic volcanic island Jan Mayen |
title_sort |
last glaciation of the arctic volcanic island jan mayen |
publisher |
Wiley |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11850/450899 https://doi.org/10.3929/ethz-b-000450899 |
long_lat |
ENVELOPE(-8.167,-8.167,71.083,71.083) |
geographic |
Arctic Beerenberg Greenland Jan Mayen |
geographic_facet |
Arctic Beerenberg Greenland Jan Mayen |
genre |
Arctic Greenland Greenland Sea Ice cap Jan Mayen North Atlantic |
genre_facet |
Arctic Greenland Greenland Sea Ice cap Jan Mayen North Atlantic |
op_source |
Boreas, 50 (1) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/bor.12482 info:eu-repo/semantics/altIdentifier/wos/000583192900001 http://hdl.handle.net/20.500.11850/450899 doi:10.3929/ethz-b-000450899 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/20.500.11850/450899 https://doi.org/10.3929/ethz-b-000450899 https://doi.org/10.1111/bor.12482 |
_version_ |
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