Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review
The onshore record of Middle to Late Weichselian sediments and glacial history in Norway indicates a succession of four major ice advances alternating with rapid, considerable ice recessions and interstadial conditions. During all the glacial advances the ice sheet expanded from onshore/inland posit...
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Norwegian Polar Institute
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ftjpolarres:oai:journals.openacademia.net:article/2139 2023-05-15T16:33:47+02:00 Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review Olsen, Lars Sveian, Harald van der Borg, Klaas Bergstram, Bjørn Broekmans, Maarten 2002-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2139 https://doi.org/10.3402/polar.v21i2.6483 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2139/5390 https://polarresearch.net/index.php/polar/article/view/2139 doi:10.3402/polar.v21i2.6483 Copyright (c) 2018 Polar Research Polar Research; Vol. 21 No. 2 (2002): Special issue: Proceedings of the Changes in Climate and Environment at High Latitudes Conference; 235-242 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2002 ftjpolarres https://doi.org/10.3402/polar.v21i2.6483 2021-11-11T19:12:09Z The onshore record of Middle to Late Weichselian sediments and glacial history in Norway indicates a succession of four major ice advances alternating with rapid, considerable ice recessions and interstadial conditions. During all the glacial advances the ice sheet expanded from onshore/inland positions to the shelf areas. The basis for visualizing these variations in glaciation curves constructed along nine transects from inland to shelf, and for interpretation of the palaeoclimatic history, is the regional Quaternary stratigraphy, more than 300 datings, fossil content and some palaeomagnetic data. The methods applied in recent years for AMS radiocarbon dating of glacial sediments with low organic carbon content have given promising results with respect to accuracy and precision, and the results of such datings were an important tool for our reconstructions and for timing of the ice oscillations. The rapid and rhythmic ice fluctuations, as reconstructed in our new model, have been fairly synchronous in most parts of Norway. Ice advances commenced and culminated at 40, 30-28, 24-21 and 18-15 (14C) Kya. We describe three intervening interstadials from inland sites: Hattfjelldal I, Hattfjelldal II and Trofors. Our stratigraphical record also includes many indications of high, pre-Holocene, relative sea levels, suggesting a considerable glacioisostatic depression of western Scandinavia during the interstadials. In our glaciation model we suggest that, in addition to precipitation, the mountainous fjord and valley topography, glacial isostasy and relative sea level changes were probably more important for the size of the glacial fluctuations than were air temperature changes. Article in Journal/Newspaper Hattfjelldal Ice Sheet Polar Research Trofors Polar Research (E-Journal) Norway Kya ENVELOPE(8.308,8.308,63.772,63.772) Hattfjelldal ENVELOPE(13.988,13.988,65.597,65.597) Trofors ENVELOPE(13.406,13.406,65.533,65.533) Polar Research 21 2 235 242 |
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Open Polar |
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Polar Research (E-Journal) |
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ftjpolarres |
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English |
description |
The onshore record of Middle to Late Weichselian sediments and glacial history in Norway indicates a succession of four major ice advances alternating with rapid, considerable ice recessions and interstadial conditions. During all the glacial advances the ice sheet expanded from onshore/inland positions to the shelf areas. The basis for visualizing these variations in glaciation curves constructed along nine transects from inland to shelf, and for interpretation of the palaeoclimatic history, is the regional Quaternary stratigraphy, more than 300 datings, fossil content and some palaeomagnetic data. The methods applied in recent years for AMS radiocarbon dating of glacial sediments with low organic carbon content have given promising results with respect to accuracy and precision, and the results of such datings were an important tool for our reconstructions and for timing of the ice oscillations. The rapid and rhythmic ice fluctuations, as reconstructed in our new model, have been fairly synchronous in most parts of Norway. Ice advances commenced and culminated at 40, 30-28, 24-21 and 18-15 (14C) Kya. We describe three intervening interstadials from inland sites: Hattfjelldal I, Hattfjelldal II and Trofors. Our stratigraphical record also includes many indications of high, pre-Holocene, relative sea levels, suggesting a considerable glacioisostatic depression of western Scandinavia during the interstadials. In our glaciation model we suggest that, in addition to precipitation, the mountainous fjord and valley topography, glacial isostasy and relative sea level changes were probably more important for the size of the glacial fluctuations than were air temperature changes. |
format |
Article in Journal/Newspaper |
author |
Olsen, Lars Sveian, Harald van der Borg, Klaas Bergstram, Bjørn Broekmans, Maarten |
spellingShingle |
Olsen, Lars Sveian, Harald van der Borg, Klaas Bergstram, Bjørn Broekmans, Maarten Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review |
author_facet |
Olsen, Lars Sveian, Harald van der Borg, Klaas Bergstram, Bjørn Broekmans, Maarten |
author_sort |
Olsen, Lars |
title |
Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review |
title_short |
Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review |
title_full |
Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review |
title_fullStr |
Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review |
title_full_unstemmed |
Rapid and rhythmic ice sheet fluctuations in western Scandinavia 15-40 Kya–a review |
title_sort |
rapid and rhythmic ice sheet fluctuations in western scandinavia 15-40 kya–a review |
publisher |
Norwegian Polar Institute |
publishDate |
2002 |
url |
https://polarresearch.net/index.php/polar/article/view/2139 https://doi.org/10.3402/polar.v21i2.6483 |
long_lat |
ENVELOPE(8.308,8.308,63.772,63.772) ENVELOPE(13.988,13.988,65.597,65.597) ENVELOPE(13.406,13.406,65.533,65.533) |
geographic |
Norway Kya Hattfjelldal Trofors |
geographic_facet |
Norway Kya Hattfjelldal Trofors |
genre |
Hattfjelldal Ice Sheet Polar Research Trofors |
genre_facet |
Hattfjelldal Ice Sheet Polar Research Trofors |
op_source |
Polar Research; Vol. 21 No. 2 (2002): Special issue: Proceedings of the Changes in Climate and Environment at High Latitudes Conference; 235-242 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2139/5390 https://polarresearch.net/index.php/polar/article/view/2139 doi:10.3402/polar.v21i2.6483 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v21i2.6483 |
container_title |
Polar Research |
container_volume |
21 |
container_issue |
2 |
container_start_page |
235 |
op_container_end_page |
242 |
_version_ |
1766023497465724928 |