Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction
The BRITICE-CHRONO consortium of researchers undertook a dating programme to constrain the timing of advance, maximum extent and retreat of the British–Irish Ice Sheet between 31 000 and 15 000 years before present. The dating campaign across Ireland and Britain and their continental shelves, and ac...
Published in: | Boreas |
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Main Authors: | , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley
2022
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Subjects: | |
Online Access: | http://hdl.handle.net/1893/34770 https://doi.org/10.1111/bor.12594 http://dspace.stir.ac.uk/retrieve/8d577b73-20ca-48c5-b3d1-cfa5525e9b65/Boreas-2022-Clark.pdf |
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ftunivstirling:oai:dspace.stir.ac.uk:1893/34770 |
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openpolar |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
Geology Archeology Ecology Evolution Behavior and Systematics |
spellingShingle |
Geology Archeology Ecology Evolution Behavior and Systematics Clark, Chris D Ely, Jeremy C Hindmarsh, Richard C A Bradley, Sarah Ignéczi, Adam Fabel, Derek Ó Cofaigh, Colm Chiverrell, Richard C Scourse, James Benetti, Sara Bradwell, Tom Evans, David J A Roberts, David H Burke, Matt Callard, S Louise Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction |
topic_facet |
Geology Archeology Ecology Evolution Behavior and Systematics |
description |
The BRITICE-CHRONO consortium of researchers undertook a dating programme to constrain the timing of advance, maximum extent and retreat of the British–Irish Ice Sheet between 31 000 and 15 000 years before present. The dating campaign across Ireland and Britain and their continental shelves, and across the North Sea included 1500 days of field investigation yielding 18 000 km of marine geophysical data, 377 cores of sea floor sediments, and geomorphological and stratigraphical information at 121 sites on land; generating 690 new geochronometric ages. These findings are reported in 28 publications including synthesis into eight transect reconstructions. Here we build ice sheet-wide reconstructions consistent with these findings and using retreat patterns and dates for the inter-transect areas. Two reconstructions are presented, a wholly empirical version and a version that combines modelling with the new empirical evidence. Palaeoglaciological maps of ice extent, thickness, velocity, and flow geometry at thousand-year timesteps are presented. The maximum ice volume of 1.8 m sea level equivalent occurred at 23 ka. A larger extent than previously defined is found and widespread advance of ice to the continental shelf break is confirmed during the last glacial. Asynchrony occurred in the timing of maximum extent and onset of retreat, ranging from 30 to 22 ka. The tipping point of deglaciation at 22 ka was triggered by ice stream retreat and saddle collapses. Analysis of retreat rates leads us to accept our hypothesis that the marine-influenced sectors collapsed rapidly. First order controls on ice-sheet demise were glacio-isostatic loading triggering retreat of marine sectors, aided by glaciological instabilities and then climate warming finished off the smaller, terrestrial ice sheet. Overprinted on this signal were second order controls arising from variations in trough topographies and with sector-scale ice geometric readjustments arising from dispositions in the geography of the landscape. These second order ... |
author2 |
Natural Environment Research Council European Commission (Horizon Europe) University of Sheffield British Antarctic Survey University of Glasgow Durham University University of Liverpool University of Exeter Ulster University Biological and Environmental Sciences Scottish Environment Protection Agency (SEPA) Newcastle University orcid:0000-0002-1021-6679 orcid:0000-0003-0947-3309 orcid:0000-0002-5976-8423 |
format |
Article in Journal/Newspaper |
author |
Clark, Chris D Ely, Jeremy C Hindmarsh, Richard C A Bradley, Sarah Ignéczi, Adam Fabel, Derek Ó Cofaigh, Colm Chiverrell, Richard C Scourse, James Benetti, Sara Bradwell, Tom Evans, David J A Roberts, David H Burke, Matt Callard, S Louise |
author_facet |
Clark, Chris D Ely, Jeremy C Hindmarsh, Richard C A Bradley, Sarah Ignéczi, Adam Fabel, Derek Ó Cofaigh, Colm Chiverrell, Richard C Scourse, James Benetti, Sara Bradwell, Tom Evans, David J A Roberts, David H Burke, Matt Callard, S Louise |
author_sort |
Clark, Chris D |
title |
Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction |
title_short |
Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction |
title_full |
Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction |
title_fullStr |
Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction |
title_full_unstemmed |
Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction |
title_sort |
growth and retreat of the last british–irish ice sheet, 31 000 to 15 000 years ago: the britice‐chrono reconstruction |
publisher |
Wiley |
publishDate |
2022 |
url |
http://hdl.handle.net/1893/34770 https://doi.org/10.1111/bor.12594 http://dspace.stir.ac.uk/retrieve/8d577b73-20ca-48c5-b3d1-cfa5525e9b65/Boreas-2022-Clark.pdf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Clark CD, Ely JC, Hindmarsh RCA, Bradley S, Ignéczi A, Fabel D, Ó Cofaigh C, Chiverrell RC, Scourse J, Benetti S, Bradwell T, Evans DJA, Roberts DH, Burke M & Callard SL (2022) Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction. Boreas , 51 (4), pp. 699-758. https://doi.org/10.1111/bor.12594 http://hdl.handle.net/1893/34770 doi:10.1111/bor.12594 WOS:000851253500001 2-s2.0-85137475530 1862201 http://dspace.stir.ac.uk/retrieve/8d577b73-20ca-48c5-b3d1-cfa5525e9b65/Boreas-2022-Clark.pdf |
op_rights |
© 2022 The Authors. Boreas published by John Wiley & Sons Ltd on behalf of The Boreas Collegium. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/bor.12594 |
container_title |
Boreas |
container_volume |
51 |
container_issue |
4 |
container_start_page |
699 |
op_container_end_page |
758 |
_version_ |
1766030556971139072 |
spelling |
ftunivstirling:oai:dspace.stir.ac.uk:1893/34770 2023-05-15T16:40:11+02:00 Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction Clark, Chris D Ely, Jeremy C Hindmarsh, Richard C A Bradley, Sarah Ignéczi, Adam Fabel, Derek Ó Cofaigh, Colm Chiverrell, Richard C Scourse, James Benetti, Sara Bradwell, Tom Evans, David J A Roberts, David H Burke, Matt Callard, S Louise Natural Environment Research Council European Commission (Horizon Europe) University of Sheffield British Antarctic Survey University of Glasgow Durham University University of Liverpool University of Exeter Ulster University Biological and Environmental Sciences Scottish Environment Protection Agency (SEPA) Newcastle University orcid:0000-0002-1021-6679 orcid:0000-0003-0947-3309 orcid:0000-0002-5976-8423 2022-10 application/pdf http://hdl.handle.net/1893/34770 https://doi.org/10.1111/bor.12594 http://dspace.stir.ac.uk/retrieve/8d577b73-20ca-48c5-b3d1-cfa5525e9b65/Boreas-2022-Clark.pdf en eng Wiley Clark CD, Ely JC, Hindmarsh RCA, Bradley S, Ignéczi A, Fabel D, Ó Cofaigh C, Chiverrell RC, Scourse J, Benetti S, Bradwell T, Evans DJA, Roberts DH, Burke M & Callard SL (2022) Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE‐CHRONO reconstruction. Boreas , 51 (4), pp. 699-758. https://doi.org/10.1111/bor.12594 http://hdl.handle.net/1893/34770 doi:10.1111/bor.12594 WOS:000851253500001 2-s2.0-85137475530 1862201 http://dspace.stir.ac.uk/retrieve/8d577b73-20ca-48c5-b3d1-cfa5525e9b65/Boreas-2022-Clark.pdf © 2022 The Authors. Boreas published by John Wiley & Sons Ltd on behalf of The Boreas Collegium. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0/ CC-BY Geology Archeology Ecology Evolution Behavior and Systematics Journal Article VoR - Version of Record 2022 ftunivstirling https://doi.org/10.1111/bor.12594 2023-02-09T23:17:17Z The BRITICE-CHRONO consortium of researchers undertook a dating programme to constrain the timing of advance, maximum extent and retreat of the British–Irish Ice Sheet between 31 000 and 15 000 years before present. The dating campaign across Ireland and Britain and their continental shelves, and across the North Sea included 1500 days of field investigation yielding 18 000 km of marine geophysical data, 377 cores of sea floor sediments, and geomorphological and stratigraphical information at 121 sites on land; generating 690 new geochronometric ages. These findings are reported in 28 publications including synthesis into eight transect reconstructions. Here we build ice sheet-wide reconstructions consistent with these findings and using retreat patterns and dates for the inter-transect areas. Two reconstructions are presented, a wholly empirical version and a version that combines modelling with the new empirical evidence. Palaeoglaciological maps of ice extent, thickness, velocity, and flow geometry at thousand-year timesteps are presented. The maximum ice volume of 1.8 m sea level equivalent occurred at 23 ka. A larger extent than previously defined is found and widespread advance of ice to the continental shelf break is confirmed during the last glacial. Asynchrony occurred in the timing of maximum extent and onset of retreat, ranging from 30 to 22 ka. The tipping point of deglaciation at 22 ka was triggered by ice stream retreat and saddle collapses. Analysis of retreat rates leads us to accept our hypothesis that the marine-influenced sectors collapsed rapidly. First order controls on ice-sheet demise were glacio-isostatic loading triggering retreat of marine sectors, aided by glaciological instabilities and then climate warming finished off the smaller, terrestrial ice sheet. Overprinted on this signal were second order controls arising from variations in trough topographies and with sector-scale ice geometric readjustments arising from dispositions in the geography of the landscape. These second order ... Article in Journal/Newspaper Ice Sheet University of Stirling: Stirling Digital Research Repository Boreas 51 4 699 758 |