Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland
ABSTRACT Accurate reconstruction of Lateglacial and Holocene relative sea‐level (RSL) histories is complicated where mismatches exist between geological data and RSL curves generated by models of glacio‐isostatic adjustment (GIA). In Ireland, such discrepancies have profound implications for interpr...
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crwiley:10.1002/jqs.2969 2024-06-23T07:53:47+00:00 Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland Edwards, Robin Gehrels, W. Roland Brooks, Anthony Fyfe, Ralph Pullen, Katie Kuchar, Joseph Craven, Kieran Enterprise Ireland 2017 http://dx.doi.org/10.1002/jqs.2969 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2969 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2969 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 32, issue 7, page 957-975 ISSN 0267-8179 1099-1417 journal-article 2017 crwiley https://doi.org/10.1002/jqs.2969 2024-06-04T06:41:18Z ABSTRACT Accurate reconstruction of Lateglacial and Holocene relative sea‐level (RSL) histories is complicated where mismatches exist between geological data and RSL curves generated by models of glacio‐isostatic adjustment (GIA). In Ireland, such discrepancies have profound implications for interpreting the glacial history of the British Isles and for the use of glacial rebound models to predict future sea‐level changes. To address this issue we present new RSL data from four sites along the western coast of Ireland, including 17 data points from the critical period before 5000 14 C a BP for which very few data are available. We generate new RSL simulations from an existing GIA model, incorporating a thickened Irish Ice sheet component. Simulated curves from Co. Mayo and Co. Donegal accommodate the higher than present Lateglacial RSL inferred from glaciomarine muds while still meeting the requirement for below present RSL indicated by the new terrestrial limiting data points. Relaxation of trimline constraints on maximum ice sheet thickness provides considerable scope for improved GIA performance. These results demonstrate inferences about RSL drawn from GIA modelling and glacio‐sedimentary data are not mutually exclusive, and represent a significant step towards resolving a long‐standing debate between the field‐based and modelling communities. Article in Journal/Newspaper Ice Sheet Wiley Online Library Journal of Quaternary Science 32 7 957 975 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Accurate reconstruction of Lateglacial and Holocene relative sea‐level (RSL) histories is complicated where mismatches exist between geological data and RSL curves generated by models of glacio‐isostatic adjustment (GIA). In Ireland, such discrepancies have profound implications for interpreting the glacial history of the British Isles and for the use of glacial rebound models to predict future sea‐level changes. To address this issue we present new RSL data from four sites along the western coast of Ireland, including 17 data points from the critical period before 5000 14 C a BP for which very few data are available. We generate new RSL simulations from an existing GIA model, incorporating a thickened Irish Ice sheet component. Simulated curves from Co. Mayo and Co. Donegal accommodate the higher than present Lateglacial RSL inferred from glaciomarine muds while still meeting the requirement for below present RSL indicated by the new terrestrial limiting data points. Relaxation of trimline constraints on maximum ice sheet thickness provides considerable scope for improved GIA performance. These results demonstrate inferences about RSL drawn from GIA modelling and glacio‐sedimentary data are not mutually exclusive, and represent a significant step towards resolving a long‐standing debate between the field‐based and modelling communities. |
author2 |
Enterprise Ireland |
format |
Article in Journal/Newspaper |
author |
Edwards, Robin Gehrels, W. Roland Brooks, Anthony Fyfe, Ralph Pullen, Katie Kuchar, Joseph Craven, Kieran |
spellingShingle |
Edwards, Robin Gehrels, W. Roland Brooks, Anthony Fyfe, Ralph Pullen, Katie Kuchar, Joseph Craven, Kieran Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland |
author_facet |
Edwards, Robin Gehrels, W. Roland Brooks, Anthony Fyfe, Ralph Pullen, Katie Kuchar, Joseph Craven, Kieran |
author_sort |
Edwards, Robin |
title |
Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland |
title_short |
Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland |
title_full |
Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland |
title_fullStr |
Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland |
title_full_unstemmed |
Resolving discrepancies between field and modelled relative sea‐level data: lessons from western Ireland |
title_sort |
resolving discrepancies between field and modelled relative sea‐level data: lessons from western ireland |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/jqs.2969 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2969 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2969 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal of Quaternary Science volume 32, issue 7, page 957-975 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.2969 |
container_title |
Journal of Quaternary Science |
container_volume |
32 |
container_issue |
7 |
container_start_page |
957 |
op_container_end_page |
975 |
_version_ |
1802645601480867840 |