Topography and ice sheet growth
Abstract This paper uses a numerical ice sheet model to investigate the role of topography in influencing ice sheet growth. The model is applied to the maritime, mid‐latitude uplands of Scotland and relies on a series of assumptions about mass balance, topography, and ice flow. It is driven by an im...
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crwiley:10.1002/esp.3290150705 2024-09-09T19:45:00+00:00 Topography and ice sheet growth Payne, Antony Sugden, David 1990 http://dx.doi.org/10.1002/esp.3290150705 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3290150705 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3290150705 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 15, issue 7, page 625-639 ISSN 0197-9337 1096-9837 journal-article 1990 crwiley https://doi.org/10.1002/esp.3290150705 2024-07-25T04:21:05Z Abstract This paper uses a numerical ice sheet model to investigate the role of topography in influencing ice sheet growth. The model is applied to the maritime, mid‐latitude uplands of Scotland and relies on a series of assumptions about mass balance, topography, and ice flow. It is driven by an imposed pattern of temperature change. The model is able to predict effectively the extent and thickness of the Loch Lomond ice sheet, using a palaeotemperature curve based on Coleoptera assemblages. A series of experiments with a stepped, constant July air temperature depression suggests that in Scotland a change in excess of −3·0°C is necessary to initiate ice sheet growth; that steady state ice caps build up at changes of −3 to − 6·5°C; and that large ice sheets build up at changes of more than − 6·625°C. The bifurcation revealed by the last two types of behaviour is the result of topography. Both the vertical amplitude and the spatial distribution of bedrock basins and ridges are important in determining the pattern, rate, and extent of ice sheet growth. The implication is that topography plays an important role in determining the dynamics of ice sheet growth. Article in Journal/Newspaper Ice Sheet Wiley Online Library Loch Lomond ENVELOPE(-125.746,-125.746,54.239,54.239) Earth Surface Processes and Landforms 15 7 625 639 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract This paper uses a numerical ice sheet model to investigate the role of topography in influencing ice sheet growth. The model is applied to the maritime, mid‐latitude uplands of Scotland and relies on a series of assumptions about mass balance, topography, and ice flow. It is driven by an imposed pattern of temperature change. The model is able to predict effectively the extent and thickness of the Loch Lomond ice sheet, using a palaeotemperature curve based on Coleoptera assemblages. A series of experiments with a stepped, constant July air temperature depression suggests that in Scotland a change in excess of −3·0°C is necessary to initiate ice sheet growth; that steady state ice caps build up at changes of −3 to − 6·5°C; and that large ice sheets build up at changes of more than − 6·625°C. The bifurcation revealed by the last two types of behaviour is the result of topography. Both the vertical amplitude and the spatial distribution of bedrock basins and ridges are important in determining the pattern, rate, and extent of ice sheet growth. The implication is that topography plays an important role in determining the dynamics of ice sheet growth. |
format |
Article in Journal/Newspaper |
author |
Payne, Antony Sugden, David |
spellingShingle |
Payne, Antony Sugden, David Topography and ice sheet growth |
author_facet |
Payne, Antony Sugden, David |
author_sort |
Payne, Antony |
title |
Topography and ice sheet growth |
title_short |
Topography and ice sheet growth |
title_full |
Topography and ice sheet growth |
title_fullStr |
Topography and ice sheet growth |
title_full_unstemmed |
Topography and ice sheet growth |
title_sort |
topography and ice sheet growth |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1002/esp.3290150705 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3290150705 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3290150705 |
long_lat |
ENVELOPE(-125.746,-125.746,54.239,54.239) |
geographic |
Loch Lomond |
geographic_facet |
Loch Lomond |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Earth Surface Processes and Landforms volume 15, issue 7, page 625-639 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.3290150705 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
15 |
container_issue |
7 |
container_start_page |
625 |
op_container_end_page |
639 |
_version_ |
1809914650843676672 |