Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets
Abstract Palaeo-glacial landforms can give insights into bed roughness that currently cannot be captured underneath contemporary-ice streams. A few studies have measured bed roughness of palaeo-ice streams but the bed roughness of specific landform assemblages has not been assessed. If glacial landf...
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Online Access: | http://dx.doi.org/10.1017/jog.2021.122 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021001222 |
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crcambridgeupr:10.1017/jog.2021.122 2024-03-03T08:46:03+00:00 Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets Falcini, Francesca A. M. Krabbendam, Maarten Selby, Katherine A. Rippin, David M. Natural Environment Research Council 2021 http://dx.doi.org/10.1017/jog.2021.122 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021001222 en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 68, issue 269, page 518-532 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.122 2024-02-08T08:34:46Z Abstract Palaeo-glacial landforms can give insights into bed roughness that currently cannot be captured underneath contemporary-ice streams. A few studies have measured bed roughness of palaeo-ice streams but the bed roughness of specific landform assemblages has not been assessed. If glacial landform assemblages have a characteristic bed-roughness signature, this could potentially be used to constrain where certain landform assemblages exist underneath contemporary-ice sheets. To test this, bed roughness was calculated along 5 m × 5 m resolution transects (NEXTMap DTM, 5 m resolution), which were placed over glacial landform assemblages (e.g. drumlins) in the UK. We find that a combination of total roughness and anisotropy of roughness can be used to define characteristic roughness signatures of glacial landform assemblages. The results show that different window sizes are required to determine the characteristic roughness for a wide range of landform types and to produce bed-roughness signatures of these. Mega scale glacial lineations on average have the lowest bed-roughness values and are the most anisotropic landform assemblage. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 1 15 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
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Earth-Surface Processes Falcini, Francesca A. M. Krabbendam, Maarten Selby, Katherine A. Rippin, David M. Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
topic_facet |
Earth-Surface Processes |
description |
Abstract Palaeo-glacial landforms can give insights into bed roughness that currently cannot be captured underneath contemporary-ice streams. A few studies have measured bed roughness of palaeo-ice streams but the bed roughness of specific landform assemblages has not been assessed. If glacial landform assemblages have a characteristic bed-roughness signature, this could potentially be used to constrain where certain landform assemblages exist underneath contemporary-ice sheets. To test this, bed roughness was calculated along 5 m × 5 m resolution transects (NEXTMap DTM, 5 m resolution), which were placed over glacial landform assemblages (e.g. drumlins) in the UK. We find that a combination of total roughness and anisotropy of roughness can be used to define characteristic roughness signatures of glacial landform assemblages. The results show that different window sizes are required to determine the characteristic roughness for a wide range of landform types and to produce bed-roughness signatures of these. Mega scale glacial lineations on average have the lowest bed-roughness values and are the most anisotropic landform assemblage. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Falcini, Francesca A. M. Krabbendam, Maarten Selby, Katherine A. Rippin, David M. |
author_facet |
Falcini, Francesca A. M. Krabbendam, Maarten Selby, Katherine A. Rippin, David M. |
author_sort |
Falcini, Francesca A. M. |
title |
Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
title_short |
Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
title_full |
Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
title_fullStr |
Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
title_full_unstemmed |
Using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
title_sort |
using bed-roughness signatures to characterise glacial landform assemblages beneath palaeo-ice sheets |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.122 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021001222 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 68, issue 269, page 518-532 ISSN 0022-1430 1727-5652 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2021.122 |
container_title |
Journal of Glaciology |
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1 |
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15 |
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1792501878496428032 |