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...
Published in: | GFF |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Taylor & Francis
2020
|
Subjects: | |
Online Access: | https://lup.lub.lu.se/record/64a5e411-c398-49a7-8daa-61e3414478d8 https://doi.org/10.1080/11035897.2020.1822437 |
id |
ftulundlup:oai:lup.lub.lu.se:64a5e411-c398-49a7-8daa-61e3414478d8 |
---|---|
record_format |
openpolar |
spelling |
ftulundlup:oai:lup.lub.lu.se:64a5e411-c398-49a7-8daa-61e3414478d8 2023-05-15T16:29:56+02:00 Dynamics of a retreating ice sheet : a LiDAR study in Värmland, SW Sweden Goodship, Alastair Alexanderson, Helena 2020 https://lup.lub.lu.se/record/64a5e411-c398-49a7-8daa-61e3414478d8 https://doi.org/10.1080/11035897.2020.1822437 eng eng Taylor & Francis https://lup.lub.lu.se/record/64a5e411-c398-49a7-8daa-61e3414478d8 http://dx.doi.org/10.1080/11035897.2020.1822437 scopus:85096146950 GFF; 142(4), pp 325-345 (2020) ISSN: 1103-5897 Geology De Geer moraines deglaciation DEM glacial geomorphology Holocene ice-sheet dynamics ice-sheet retreat Scandinavian Ice Sheet (SIS) streamlined terrain contributiontojournal/systematicreview info:eu-repo/semantics/article text 2020 ftulundlup https://doi.org/10.1080/11035897.2020.1822437 2023-02-01T23:40:13Z 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 Lund University Publications (LUP) Greenland GFF 142 4 325 345 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology De Geer moraines deglaciation DEM glacial geomorphology Holocene ice-sheet dynamics ice-sheet retreat Scandinavian Ice Sheet (SIS) streamlined terrain |
spellingShingle |
Geology De Geer moraines deglaciation DEM glacial geomorphology Holocene ice-sheet dynamics ice-sheet retreat Scandinavian Ice Sheet (SIS) streamlined terrain Goodship, Alastair Alexanderson, Helena Dynamics of a retreating ice sheet : a LiDAR study in Värmland, SW Sweden |
topic_facet |
Geology De Geer moraines deglaciation DEM glacial geomorphology Holocene ice-sheet dynamics ice-sheet retreat Scandinavian Ice Sheet (SIS) streamlined terrain |
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://lup.lub.lu.se/record/64a5e411-c398-49a7-8daa-61e3414478d8 https://doi.org/10.1080/11035897.2020.1822437 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
GFF; 142(4), pp 325-345 (2020) ISSN: 1103-5897 |
op_relation |
https://lup.lub.lu.se/record/64a5e411-c398-49a7-8daa-61e3414478d8 http://dx.doi.org/10.1080/11035897.2020.1822437 scopus:85096146950 |
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 |
_version_ |
1766019649607041024 |