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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crwiley:10.1111/bor.12482 2024-06-02T08:02:27+00:00 The last glaciation of the Arctic volcanic island Jan Mayen Lyså, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerød, Morgan Hiksdal, Asbjørn Van Der Lelij, Roelant Vockenhuber, Christof Norges Forskningsråd 2020 http://dx.doi.org/10.1111/bor.12482 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12482 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12482 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Boreas volume 50, issue 1, page 6-28 ISSN 0300-9483 1502-3885 journal-article 2020 crwiley https://doi.org/10.1111/bor.12482 2024-05-03T10:46:56Z 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 40 Ar/ 39 Ar dating of volcanic rocks, cosmogenic nuclide ( 36 Cl) 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. Article in Journal/Newspaper Arctic Greenland Greenland Sea Ice cap Jan Mayen North Atlantic Wiley Online Library Arctic Greenland Jan Mayen Beerenberg ENVELOPE(-8.167,-8.167,71.083,71.083) Boreas 50 1 6 28 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
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 40 Ar/ 39 Ar dating of volcanic rocks, cosmogenic nuclide ( 36 Cl) 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. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Lyså, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerød, Morgan Hiksdal, Asbjørn Van Der Lelij, Roelant Vockenhuber, Christof |
spellingShingle |
Lyså, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerød, Morgan Hiksdal, Asbjørn Van Der Lelij, Roelant Vockenhuber, Christof The last glaciation of the Arctic volcanic island Jan Mayen |
author_facet |
Lyså, Astrid Larsen, Eiliv A. Anjar, Johanna Akçar, Naki Ganerød, Morgan Hiksdal, Asbjørn Van Der Lelij, Roelant Vockenhuber, Christof |
author_sort |
Lyså, 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 |
2020 |
url |
http://dx.doi.org/10.1111/bor.12482 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12482 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12482 |
long_lat |
ENVELOPE(-8.167,-8.167,71.083,71.083) |
geographic |
Arctic Greenland Jan Mayen Beerenberg |
geographic_facet |
Arctic Greenland Jan Mayen Beerenberg |
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 volume 50, issue 1, page 6-28 ISSN 0300-9483 1502-3885 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12482 |
container_title |
Boreas |
container_volume |
50 |
container_issue |
1 |
container_start_page |
6 |
op_container_end_page |
28 |
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1800746942516428800 |