Other Scholarly Content


Response of the Irish Ice Sheet to abrupt climate change during the last deglaciation Public Deposited

Downloadable Content

Download PDF

This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at:  http://www.journals.elsevier.com/quaternary-science-reviews/#description. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work.


Attribute NameValues
  • We summarize 121 ¹⁴C and in-situ cosmogenic (¹⁰Be and ³⁶Cl) ages that constrain fluctuations of the Irish Ice Sheet (IIS) since the Last Glacial Maximum (LGM) that can be linked to abrupt climate changes in the North Atlantic region. These data provide a robust means to date ice-sheet fluctuations because similar-age events can be identified from widely spaced sites, they are constrained by stratigraphy, and they can be related to large changes in the configuration of a dynamic ice sheet. The following events are recognized. (1) AMS ¹⁴C ages and ¹⁰Be and ³⁶Cl ages as well as offshore data suggest that the last maximum advance of the IIS occurred between ∼27 and 23 cal ka. (2) Deglaciation began on the western continental shelf and in the Irish Sea Basin at ∼23 cal ka. Dated sites from around Ireland constrain subsequent widespread retreat of ice-sheet margins from the shelf onto Irish coastlines during the Cooley Point Interstadial ≥20 cal ka. AMS ¹⁴C ages suggest that the Cooley Point Interstadial continued until ≤18.2 cal ka B.P. During this interstadial, retreat of the ice-sheet margin into the northern Irish Sea Basin indicates that the IIS may have lost up to two-thirds of its mass. (3) Dated sites from northwestern and eastern Ireland indicate that the Cooley Point Interstadial was terminated by ice readvance during the Clogher Head Stadial at ∼18.2 cal ka. (4) The Linns Interstadial was a brief interval (≥17.0–≥16.5 cal ka) of ice recession following the Clogher Head Stadial that is identified from raised marine sediments in eastern and northern Ireland and cosmogenic ages elsewhere in Ireland. (5) The IIS subsequently readvanced during the Killard Point Stadial, reaching its maximum extent ∼16.5 cal ka, indicating that the readvance began sometime earlier. (6) Widespread retreat of the IIS began by ∼15.5 cal ka during the Rough Island Interstadial. (6) Readvance of cirque glaciers in western Ireland occurred during the Younger-Dryas equivalent Nahanagan Stadial.
Resource Type
Date Available
Date Issued
  • Clark, J., Clark, P. U., McCabe, A. M., & Bowen, D. Q. (2012). Response of the irish ice sheet to abrupt climate change during the last deglaciation. Quaternary Science Reviews, 35, 100-115. doi: 10.1016/j.quascirev.2012.01.001
Rights Statement
Funding Statement (additional comments about funding)
  • J. Clark, D. Bowen, and M. McCabe thank NERC for support of cosmogenic dating, and P. Clark thanks the U.S. NSF Paleoclimate Program for support of radiocarbon dating.
Additional Information
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-08-01T17:31:26Z No. of bitstreams: 1 ClarkJorieCEOASResponseIrishIce.pdf: 1983615 bytes, checksum: ca225870c20df6e608136d728b140e6d (MD5)
  • description.provenance : Made available in DSpace on 2012-08-01T17:31:26Z (GMT). No. of bitstreams: 1 ClarkJorieCEOASResponseIrishIce.pdf: 1983615 bytes, checksum: ca225870c20df6e608136d728b140e6d (MD5) Previous issue date: 2012-03-05



This work has no parents.