An improved glacial isostatic adjustment model for the British Isles
Abstract The glacial isostatic adjustment (GIA) of the British Isles is of interest due to the constraints that can be provided on key model parameters such as the global meltwater signal, local ice sheet history and viscoelastic earth structure. A number of recent studies have modelled relative sea...
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crwiley:10.1002/jqs.1481 2024-09-15T18:12:20+00:00 An improved glacial isostatic adjustment model for the British Isles Bradley, Sarah L. Milne, Glenn A. Shennan, Ian Edwards, Robin 2011 http://dx.doi.org/10.1002/jqs.1481 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1481 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1481 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 26, issue 5, page 541-552 ISSN 0267-8179 1099-1417 journal-article 2011 crwiley https://doi.org/10.1002/jqs.1481 2024-09-03T04:26:33Z Abstract The glacial isostatic adjustment (GIA) of the British Isles is of interest due to the constraints that can be provided on key model parameters such as the global meltwater signal, local ice sheet history and viscoelastic earth structure. A number of recent studies have modelled relative sea‐level (RSL) data from this region to constrain model parameters. As indicated in these studies, the sensitivity of these data to both local and global parameters results in a highly non‐unique problem. This study aims to address this inherent non‐uniqueness by combining a previously published British–Irish ice model that is based on the most recent geomorphological data with a new global ice sheet model that provides an accurate prediction of eustatic sea‐level change. In addition, constraints from Global Positioning System (GPS) measurements of present‐day vertical land motion are considered alongside the entirety of RSL data from both Great Britain and Ireland. A model solution is found that provides a high‐quality fit to both the RSL data and the GPS data. Within the range of earth viscosity values considered, the optimal data model fits were achieved with a relatively thin lithosphere (71 km), upper mantle viscosities in the range 4–6 × 10 20 Pa s and lower mantle viscosities ≥ 3 × 10 22 Pa s. Copyright © 2011 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice Sheet Wiley Online Library Journal of Quaternary Science 26 5 541 552 |
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Wiley Online Library |
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language |
English |
description |
Abstract The glacial isostatic adjustment (GIA) of the British Isles is of interest due to the constraints that can be provided on key model parameters such as the global meltwater signal, local ice sheet history and viscoelastic earth structure. A number of recent studies have modelled relative sea‐level (RSL) data from this region to constrain model parameters. As indicated in these studies, the sensitivity of these data to both local and global parameters results in a highly non‐unique problem. This study aims to address this inherent non‐uniqueness by combining a previously published British–Irish ice model that is based on the most recent geomorphological data with a new global ice sheet model that provides an accurate prediction of eustatic sea‐level change. In addition, constraints from Global Positioning System (GPS) measurements of present‐day vertical land motion are considered alongside the entirety of RSL data from both Great Britain and Ireland. A model solution is found that provides a high‐quality fit to both the RSL data and the GPS data. Within the range of earth viscosity values considered, the optimal data model fits were achieved with a relatively thin lithosphere (71 km), upper mantle viscosities in the range 4–6 × 10 20 Pa s and lower mantle viscosities ≥ 3 × 10 22 Pa s. Copyright © 2011 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Bradley, Sarah L. Milne, Glenn A. Shennan, Ian Edwards, Robin |
spellingShingle |
Bradley, Sarah L. Milne, Glenn A. Shennan, Ian Edwards, Robin An improved glacial isostatic adjustment model for the British Isles |
author_facet |
Bradley, Sarah L. Milne, Glenn A. Shennan, Ian Edwards, Robin |
author_sort |
Bradley, Sarah L. |
title |
An improved glacial isostatic adjustment model for the British Isles |
title_short |
An improved glacial isostatic adjustment model for the British Isles |
title_full |
An improved glacial isostatic adjustment model for the British Isles |
title_fullStr |
An improved glacial isostatic adjustment model for the British Isles |
title_full_unstemmed |
An improved glacial isostatic adjustment model for the British Isles |
title_sort |
improved glacial isostatic adjustment model for the british isles |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/jqs.1481 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1481 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1481 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal of Quaternary Science volume 26, issue 5, page 541-552 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1481 |
container_title |
Journal of Quaternary Science |
container_volume |
26 |
container_issue |
5 |
container_start_page |
541 |
op_container_end_page |
552 |
_version_ |
1810449913716146176 |