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Maximum extent and readvance dynamics of the Irish Sea Ice Stream and Irish Sea Glacier since the Last Glacial Maximum

Scourse, J.D.; Chiverrell, R.C.; Smedley, R.K.; Small, D.; Burke, M.J.; Saher, M.; Van Landeghem, K.J.J.; Duller, G.A.T.; Cofaigh, C. Ó; Bateman, M.D.; Benetti, S.; Bradley, S.; Callard, L.; Evans, D.J.A.; Fabel, D.; Jenkins, G.T.H.; McCarron, S.; Medialdea, A.; Moreton, S.; Ou, X.; Praeg, D.; Roberts, D.H.; Roberts, H.M.; Clark, C.D.

Maximum extent and readvance dynamics of the Irish Sea Ice Stream and Irish Sea Glacier since the Last Glacial Maximum Thumbnail


Authors

J.D. Scourse

R.C. Chiverrell

R.K. Smedley

M.J. Burke

M. Saher

K.J.J. Van Landeghem

G.A.T. Duller

M.D. Bateman

S. Benetti

S. Bradley

L. Callard

D. Fabel

G.T.H. Jenkins

S. McCarron

A. Medialdea

S. Moreton

X. Ou

D. Praeg

C.D. Clark



Abstract

The BRITICE‐CHRONO Project has generated a suite of recently published radiocarbon ages from deglacial sequences offshore in the Celtic and Irish seas and terrestrial cosmogenic nuclide and optically stimulated luminescence ages from adjacent onshore sites. All published data are integrated here with new geochronological data from Wales in a revised Bayesian analysis that enables reconstruction of ice retreat dynamics across the basin. Patterns and changes in the pace of deglaciation are conditioned more by topographic constraints and internal ice dynamics than by external controls. The data indicate a major but rapid and very short‐lived extensive thin ice advance of the Irish Sea Ice Stream (ISIS) more than 300 km south of St George's Channel to a marine calving margin at the shelf break at 25.5 ka; this may have been preceded by extensive ice accumulation plugging the constriction of St George's Channel. The release event between 25 and 26 ka is interpreted to have stimulated fast ice streaming and diverted ice to the west in the northern Irish Sea into the main axis of the marine ISIS away from terrestrial ice terminating in the English Midlands, a process initiating ice stagnation and the formation of an extensive dead ice landscape in the Midlands.

Citation

Scourse, J., Chiverrell, R., Smedley, R., Small, D., Burke, M., Saher, M., …Clark, C. (2021). Maximum extent and readvance dynamics of the Irish Sea Ice Stream and Irish Sea Glacier since the Last Glacial Maximum. Journal of Quaternary Science, 1-25. https://doi.org/10.1002/jqs.3313

Journal Article Type Article
Acceptance Date Mar 18, 2021
Online Publication Date May 7, 2021
Publication Date 2021
Deposit Date May 16, 2021
Publicly Available Date May 17, 2021
Journal Journal of Quaternary Science
Print ISSN 0267-8179
Electronic ISSN 1099-1417
Publisher Wiley
Peer Reviewed Peer Reviewed
Pages 1-25
DOI https://doi.org/10.1002/jqs.3313
Public URL https://durham-repository.worktribe.com/output/1242517

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Published Journal Article (Advance online version) (10.8 Mb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Advance online version © 2021 The Authors Journal of Quaternary Science Published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.





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