The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap
During the L ast G lacial M aximum, the B ritish– I rish I ce S heet was dominated by a number of accumulation centres, including a terrestrially based, semi‐independent icecap centred on W ales. The dynamics of this W elsh I ce C ap ( WIC ) over the last glacial period are still relatively poorly u...
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crwiley:10.1111/j.1502-3885.2012.00301.x 2024-09-15T18:11:47+00:00 The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap Patton, Henry Hubbard, Alun Glasser, Neil F. Bradwell, Tom Golledge, Nicholas R. 2012 http://dx.doi.org/10.1111/j.1502-3885.2012.00301.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2012.00301.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2012.00301.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 42, issue 3, page 491-510 ISSN 0300-9483 1502-3885 journal-article 2012 crwiley https://doi.org/10.1111/j.1502-3885.2012.00301.x 2024-07-11T04:37:10Z During the L ast G lacial M aximum, the B ritish– I rish I ce S heet was dominated by a number of accumulation centres, including a terrestrially based, semi‐independent icecap centred on W ales. The dynamics of this W elsh I ce C ap ( WIC ) over the last glacial period are still relatively poorly understood, with few studies taking into consideration the dynamic evolution of the icecap as a whole. Here we contrast results from two modelled reconstructions of the WIC in conjunction with the wider glacial geomorphological record to elucidate understanding of its form, extent and dynamics. Model output was analysed to yield zones of high basal motion and the spatial distribution of potential glacial erosion. We conclude that coherent flowsets of streamlined bedforms are linked to fast‐flowing outlets dominated by basal sliding. Large‐scale changes in dynamics are discussed, with a number of possible major advances proposed over the glacial cycle. Maximum ice thicknesses of ∼1200 m in M id W ales indicate that all mountain summits were probably ice‐covered during the Last Glacial Maximum, even if it was with a thin protective mantle of cold‐based ice, leading to landscape preservation of these upland zones. The distribution, dynamism and landscape modification related to the WIC are further discussed at the regional scale. Model predictions of glacier distribution through the Y ounger D ryas stadial accord well with geologically reconstructed limits at this time. Article in Journal/Newspaper Ice cap Wiley Online Library Boreas 42 3 491 510 |
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Wiley Online Library |
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English |
description |
During the L ast G lacial M aximum, the B ritish– I rish I ce S heet was dominated by a number of accumulation centres, including a terrestrially based, semi‐independent icecap centred on W ales. The dynamics of this W elsh I ce C ap ( WIC ) over the last glacial period are still relatively poorly understood, with few studies taking into consideration the dynamic evolution of the icecap as a whole. Here we contrast results from two modelled reconstructions of the WIC in conjunction with the wider glacial geomorphological record to elucidate understanding of its form, extent and dynamics. Model output was analysed to yield zones of high basal motion and the spatial distribution of potential glacial erosion. We conclude that coherent flowsets of streamlined bedforms are linked to fast‐flowing outlets dominated by basal sliding. Large‐scale changes in dynamics are discussed, with a number of possible major advances proposed over the glacial cycle. Maximum ice thicknesses of ∼1200 m in M id W ales indicate that all mountain summits were probably ice‐covered during the Last Glacial Maximum, even if it was with a thin protective mantle of cold‐based ice, leading to landscape preservation of these upland zones. The distribution, dynamism and landscape modification related to the WIC are further discussed at the regional scale. Model predictions of glacier distribution through the Y ounger D ryas stadial accord well with geologically reconstructed limits at this time. |
format |
Article in Journal/Newspaper |
author |
Patton, Henry Hubbard, Alun Glasser, Neil F. Bradwell, Tom Golledge, Nicholas R. |
spellingShingle |
Patton, Henry Hubbard, Alun Glasser, Neil F. Bradwell, Tom Golledge, Nicholas R. The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap |
author_facet |
Patton, Henry Hubbard, Alun Glasser, Neil F. Bradwell, Tom Golledge, Nicholas R. |
author_sort |
Patton, Henry |
title |
The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap |
title_short |
The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap |
title_full |
The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap |
title_fullStr |
The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap |
title_full_unstemmed |
The last Welsh Ice Cap: Part 2 – Dynamics of a topographically controlled icecap |
title_sort |
last welsh ice cap: part 2 – dynamics of a topographically controlled icecap |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1502-3885.2012.00301.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.2012.00301.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.2012.00301.x |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Boreas volume 42, issue 3, page 491-510 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.2012.00301.x |
container_title |
Boreas |
container_volume |
42 |
container_issue |
3 |
container_start_page |
491 |
op_container_end_page |
510 |
_version_ |
1810449358747860992 |