Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data
Despite spectacular landform evidence of a dominant role for glacial action in shaping landscapes under former northern hemisphere ice sheets, there is little quantitative evidence for rates and patterns of erosion associated with specific glaciations. Here we use cosmogenic nuclide data to assess r...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/91885 2023-05-15T16:12:53+02:00 Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data Stroeven, Arjen Fabel, Frederick Harbor, John Hattestrand, Clas Kleja, D 2015-12-13T23:23:41Z http://hdl.handle.net/1885/91885 unknown Blackwell Publishing Ltd 0435-3676 http://hdl.handle.net/1885/91885 Geografiska Annaler Keywords: cosmogenic radionuclide geomorphological mapping glacial erosion ice sheet subglacial environment Sweden Journal article 2015 ftanucanberra 2015-12-21T23:58:16Z Despite spectacular landform evidence of a dominant role for glacial action in shaping landscapes under former northern hemisphere ice sheets, there is little quantitative evidence for rates and patterns of erosion associated with specific glaciations. Here we use cosmogenic nuclide data to assess rates of subglacial erosion underneath the Fennoscandian ice sheet. By testing whether there are remnant nuclide concentrations in samples taken from sites that include both relict areas and features and landscapes typically associated with vigorous glacial erosion, we can constrain the level and pattern of modification that resulted from the last glaciation. Cosmogenic 10Be and 36Cl data from the Torneträsk region confirm the temporal and spatial variability of glacial erosion suggested by geomorphological mapping. At some sites, glacial erosion estimates in what appear to be heavily scoured areas indicate erosion of only c. 2 ± 0.4 m of bedrock, based on cosmogenic nuclide inheritance. This implies that the generation of severely scoured terrain in this study area required multiple glaciations. The overall modification produced by ice sheets along glacial corridors may be more restricted than previously thought, or may have occurred preferentially during earlier Quaternary glacial periods. Article in Journal/Newspaper Fennoscandian Ice Sheet Narvik Narvik Northern Sweden Australian National University: ANU Digital Collections Narvik ENVELOPE(17.427,17.427,68.438,68.438) Torneträsk ENVELOPE(18.861,18.861,68.392,68.392) |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: cosmogenic radionuclide geomorphological mapping glacial erosion ice sheet subglacial environment Sweden |
spellingShingle |
Keywords: cosmogenic radionuclide geomorphological mapping glacial erosion ice sheet subglacial environment Sweden Stroeven, Arjen Fabel, Frederick Harbor, John Hattestrand, Clas Kleja, D Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data |
topic_facet |
Keywords: cosmogenic radionuclide geomorphological mapping glacial erosion ice sheet subglacial environment Sweden |
description |
Despite spectacular landform evidence of a dominant role for glacial action in shaping landscapes under former northern hemisphere ice sheets, there is little quantitative evidence for rates and patterns of erosion associated with specific glaciations. Here we use cosmogenic nuclide data to assess rates of subglacial erosion underneath the Fennoscandian ice sheet. By testing whether there are remnant nuclide concentrations in samples taken from sites that include both relict areas and features and landscapes typically associated with vigorous glacial erosion, we can constrain the level and pattern of modification that resulted from the last glaciation. Cosmogenic 10Be and 36Cl data from the Torneträsk region confirm the temporal and spatial variability of glacial erosion suggested by geomorphological mapping. At some sites, glacial erosion estimates in what appear to be heavily scoured areas indicate erosion of only c. 2 ± 0.4 m of bedrock, based on cosmogenic nuclide inheritance. This implies that the generation of severely scoured terrain in this study area required multiple glaciations. The overall modification produced by ice sheets along glacial corridors may be more restricted than previously thought, or may have occurred preferentially during earlier Quaternary glacial periods. |
format |
Article in Journal/Newspaper |
author |
Stroeven, Arjen Fabel, Frederick Harbor, John Hattestrand, Clas Kleja, D |
author_facet |
Stroeven, Arjen Fabel, Frederick Harbor, John Hattestrand, Clas Kleja, D |
author_sort |
Stroeven, Arjen |
title |
Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data |
title_short |
Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data |
title_full |
Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data |
title_fullStr |
Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data |
title_full_unstemmed |
Quantifying the erosional impact of the Fennoscandian ice sheet in the Tornetrusk-Narvik corridor, northern Sweden, based on cosmogenic radionuclide data |
title_sort |
quantifying the erosional impact of the fennoscandian ice sheet in the tornetrusk-narvik corridor, northern sweden, based on cosmogenic radionuclide data |
publisher |
Blackwell Publishing Ltd |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/91885 |
long_lat |
ENVELOPE(17.427,17.427,68.438,68.438) ENVELOPE(18.861,18.861,68.392,68.392) |
geographic |
Narvik Torneträsk |
geographic_facet |
Narvik Torneträsk |
genre |
Fennoscandian Ice Sheet Narvik Narvik Northern Sweden |
genre_facet |
Fennoscandian Ice Sheet Narvik Narvik Northern Sweden |
op_source |
Geografiska Annaler |
op_relation |
0435-3676 http://hdl.handle.net/1885/91885 |
_version_ |
1765998493767303168 |