Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions
Omnsbreen is a small (<0.5 km 2 ) and degrading glacier situated at the regional lower limit of present-day permafrost distribution and glaciation. At present, the existence of Omnsbreen is mainly dependent on wind-borne snow redistributed by the prevailing westerly winter-wind, and lies in a...
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crsagepubl:10.1177/0959683612471984 2023-05-15T16:21:55+02:00 Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions Lilleøren, Karianne S Humlum, Ole Nesje, Atle Etzelmüller, Bernd 2013 http://dx.doi.org/10.1177/0959683612471984 http://journals.sagepub.com/doi/pdf/10.1177/0959683612471984 http://journals.sagepub.com/doi/full-xml/10.1177/0959683612471984 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 23, issue 6, page 796-809 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2013 crsagepubl https://doi.org/10.1177/0959683612471984 2022-07-03T16:04:37Z Omnsbreen is a small (<0.5 km 2 ) and degrading glacier situated at the regional lower limit of present-day permafrost distribution and glaciation. At present, the existence of Omnsbreen is mainly dependent on wind-borne snow redistributed by the prevailing westerly winter-wind, and lies in an area of marginal permafrost occurrence. During the ‘Little Ice Age’ (LIA) both the glacier and the distribution of permafrost in the area reached their maximum late-Holocene areal extents. The first occurrence of Omnsbreen is recorded in sediment cores retrieved from a proglacial lake and dated at ad 1425, and marks the onset of the local LIA. Reconstruction of the maximum LIA extent by means of geomorphic indicators revealed a size of 7.1 km 2 , a volume of more than 0.25 km 3 and a maximum glacier thickness of 110 m. Since the LIA Omnsbreen has been reduced by more than 90% in area. Omnsbreen retreated rapidly from its LIA maximum, which we suggest was determined by the shape of the glacier, filling up the valley, and hence being unable to accumulate wind-borne snow. Prominent glacier marginal landforms are absent along the maximum LIA extent of Omnsbreen. We propose that the lack of glacier marginal landforms in this case is indicative of a cold glacier margin, and that the landscape evolution in maritime and marginal permafrost regions is characterised as being closely connected with glacial activity. Article in Journal/Newspaper glacier Ice permafrost SAGE Publications (via Crossref) Norway The Holocene 23 6 796 809 |
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Open Polar |
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SAGE Publications (via Crossref) |
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English |
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Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
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Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Lilleøren, Karianne S Humlum, Ole Nesje, Atle Etzelmüller, Bernd Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
Omnsbreen is a small (<0.5 km 2 ) and degrading glacier situated at the regional lower limit of present-day permafrost distribution and glaciation. At present, the existence of Omnsbreen is mainly dependent on wind-borne snow redistributed by the prevailing westerly winter-wind, and lies in an area of marginal permafrost occurrence. During the ‘Little Ice Age’ (LIA) both the glacier and the distribution of permafrost in the area reached their maximum late-Holocene areal extents. The first occurrence of Omnsbreen is recorded in sediment cores retrieved from a proglacial lake and dated at ad 1425, and marks the onset of the local LIA. Reconstruction of the maximum LIA extent by means of geomorphic indicators revealed a size of 7.1 km 2 , a volume of more than 0.25 km 3 and a maximum glacier thickness of 110 m. Since the LIA Omnsbreen has been reduced by more than 90% in area. Omnsbreen retreated rapidly from its LIA maximum, which we suggest was determined by the shape of the glacier, filling up the valley, and hence being unable to accumulate wind-borne snow. Prominent glacier marginal landforms are absent along the maximum LIA extent of Omnsbreen. We propose that the lack of glacier marginal landforms in this case is indicative of a cold glacier margin, and that the landscape evolution in maritime and marginal permafrost regions is characterised as being closely connected with glacial activity. |
format |
Article in Journal/Newspaper |
author |
Lilleøren, Karianne S Humlum, Ole Nesje, Atle Etzelmüller, Bernd |
author_facet |
Lilleøren, Karianne S Humlum, Ole Nesje, Atle Etzelmüller, Bernd |
author_sort |
Lilleøren, Karianne S |
title |
Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions |
title_short |
Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions |
title_full |
Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions |
title_fullStr |
Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions |
title_full_unstemmed |
Holocene development and geomorphic processes at Omnsbreen, southern Norway: Evidence for glacier–permafrost interactions |
title_sort |
holocene development and geomorphic processes at omnsbreen, southern norway: evidence for glacier–permafrost interactions |
publisher |
SAGE Publications |
publishDate |
2013 |
url |
http://dx.doi.org/10.1177/0959683612471984 http://journals.sagepub.com/doi/pdf/10.1177/0959683612471984 http://journals.sagepub.com/doi/full-xml/10.1177/0959683612471984 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
glacier Ice permafrost |
genre_facet |
glacier Ice permafrost |
op_source |
The Holocene volume 23, issue 6, page 796-809 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683612471984 |
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23 |
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