Younger Dryas glaciers and climate in the Mourne Mountains, Northern Ireland

Iestyn D. Barr, Sam Roberson, Rory Flood, Jason Dortch

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Here, we present evidence to suggest that the Mourne Mountains, Northern Ireland, were last occupied by glaciers during the Younger Dryas Stadial. The margins of these glaciers are marked by moraines, chronologically constrained to the Younger Dryas by Schmidt hammer exposure dating. Reconstructions indicate that these glaciers had equilibrium-line altitudes (ELAs) ranging from 356 ± 33 m (a.s.l.) to 570 ± 9 m (a.s.l.), with a mean of 475 ± 36 m (a.s.l.). ELAs rise from west to east, probably reflecting the contribution of windblown snow and ice to the accumulation of Younger Dryas glaciers in the western Mournes. Taking this into consideration, a mean ‘climatic’ ELA of 529 ± 4 m (a.s.l.) is calculated for the mountains as a whole. Assuming a mean annual sea level air temperature of −8 °C, and an annual temperature range of 34 °C, degree-day modelling suggests that during the Younger Dryas, accumulation at the ‘climatic’ ELA of glaciers in the Mournes was 846–990 mm a−1. This suggests increased aridity, relative to present, and is consistent with other parts of NW Europe, where reduced precipitation alongside notable cooling is thought to reflect increased North Atlantic sea ice extent during the Younger Dryas.

Original languageEnglish
Pages (from-to)104-115
Number of pages12
JournalJournal of Quaternary Science
Issue number1
StatePublished - Jan 1 2017

Bibliographical note

Publisher Copyright:
Copyright © 2017 John Wiley & Sons, Ltd.


  • climate
  • glacier
  • Northern Ireland
  • Schmidt hammer
  • Younger Dryas

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Earth and Planetary Sciences (miscellaneous)
  • Paleontology


Dive into the research topics of 'Younger Dryas glaciers and climate in the Mourne Mountains, Northern Ireland'. Together they form a unique fingerprint.

Cite this