Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden
Värmland in south western Sweden lies across the established zone of marine-terrestrial transition of the Scandinavian Ice Sheet (SIS) margin. The region lies inside the Younger Dryas maximum limit reached at 12.7 cal ka BP and the area of rapid final SIS retreat from 11.5 cal ka BP. LiDAR data acro...
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ftunivtroemsoe:oai:munin.uit.no:10037/20046 2023-05-15T16:29:52+02:00 Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden Goodship, Alastair Alexanderson, Helena 2020-11-11 https://hdl.handle.net/10037/20046 https://doi.org/10.1080/11035897.2020.1822437 eng eng Taylor & Francis GFF Goodship, Alexanderson. Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden. GFF. 2020;142(4):325-345 FRIDAID 1856777 doi:10.1080/11035897.2020.1822437 1103-5897 2000-0863 https://hdl.handle.net/10037/20046 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1080/11035897.2020.1822437 2021-06-25T17:57:49Z Värmland in south western Sweden lies across the established zone of marine-terrestrial transition of the Scandinavian Ice Sheet (SIS) margin. The region lies inside the Younger Dryas maximum limit reached at 12.7 cal ka BP and the area of rapid final SIS retreat from 11.5 cal ka BP. LiDAR data across Värmland allows more detailed observation and analysis of glacial landforms formed during this stage than previously possible. This study synthesises geomorphological mapping performed on highly detailed digital elevation models (DEMs) and field observations across the region around Torsby in northern Värmland to reconstruct the dynamics of the ice sheet as it retreated. Several landforms that developed during deglaciation are identified and clearly reflect the change from a marine to terrestrially terminating ice margin. Ice-marginal deltas suggest a slowing of retreat at the point of marine-terrestrial transition. Increased topographic control on ice-sheet flow, pattern of drainage and ice sheet decay is indicated by the distribution of streamlined terrain, eskers, and outwash material. Hummocky terrain across low ground and incised valleys suggest persistence of ice in topographic lows beyond the retreat of the main ice front. Combined analysis of identified landforms allows a model for the pattern of retreat to be produced that traces the retreating ice sheet margin in far greater detail than previously has been possible in this area. This provides important data for understanding the final retreat of the SIS and details processes likely occurring beneath the margin of the Greenland Ice Sheet today. Article in Journal/Newspaper Greenland Ice Sheet University of Tromsø: Munin Open Research Archive Greenland GFF 142 4 325 345 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Goodship, Alastair Alexanderson, Helena Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
Värmland in south western Sweden lies across the established zone of marine-terrestrial transition of the Scandinavian Ice Sheet (SIS) margin. The region lies inside the Younger Dryas maximum limit reached at 12.7 cal ka BP and the area of rapid final SIS retreat from 11.5 cal ka BP. LiDAR data across Värmland allows more detailed observation and analysis of glacial landforms formed during this stage than previously possible. This study synthesises geomorphological mapping performed on highly detailed digital elevation models (DEMs) and field observations across the region around Torsby in northern Värmland to reconstruct the dynamics of the ice sheet as it retreated. Several landforms that developed during deglaciation are identified and clearly reflect the change from a marine to terrestrially terminating ice margin. Ice-marginal deltas suggest a slowing of retreat at the point of marine-terrestrial transition. Increased topographic control on ice-sheet flow, pattern of drainage and ice sheet decay is indicated by the distribution of streamlined terrain, eskers, and outwash material. Hummocky terrain across low ground and incised valleys suggest persistence of ice in topographic lows beyond the retreat of the main ice front. Combined analysis of identified landforms allows a model for the pattern of retreat to be produced that traces the retreating ice sheet margin in far greater detail than previously has been possible in this area. This provides important data for understanding the final retreat of the SIS and details processes likely occurring beneath the margin of the Greenland Ice Sheet today. |
format |
Article in Journal/Newspaper |
author |
Goodship, Alastair Alexanderson, Helena |
author_facet |
Goodship, Alastair Alexanderson, Helena |
author_sort |
Goodship, Alastair |
title |
Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden |
title_short |
Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden |
title_full |
Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden |
title_fullStr |
Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden |
title_full_unstemmed |
Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden |
title_sort |
dynamics of a retreating ice sheet: a lidar study in värmland, sw sweden |
publisher |
Taylor & Francis |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/20046 https://doi.org/10.1080/11035897.2020.1822437 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
GFF Goodship, Alexanderson. Dynamics of a retreating ice sheet: a LiDAR study in Värmland, SW Sweden. GFF. 2020;142(4):325-345 FRIDAID 1856777 doi:10.1080/11035897.2020.1822437 1103-5897 2000-0863 https://hdl.handle.net/10037/20046 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1080/11035897.2020.1822437 |
container_title |
GFF |
container_volume |
142 |
container_issue |
4 |
container_start_page |
325 |
op_container_end_page |
345 |
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1766019578873249792 |