Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland
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...
Published in: | Journal of Quaternary Science |
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Online Access: | https://pure.qub.ac.uk/en/publications/younger-dryas-glaciers-and-climate-in-the-mourne-mountains-northern-ireland(7b5b3e5f-f9a3-46d2-8582-f4eba0932290).html https://doi.org/10.1002/jqs.2927 https://pureadmin.qub.ac.uk/ws/files/123200025/Younger_Dryas_glaciers_and_climate_in_the_Mourne_Mountains_Northern_Ireland.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/jqs.2927/full |
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/7b5b3e5f-f9a3-46d2-8582-f4eba0932290 2023-05-15T17:33:21+02:00 Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland Barr, Iestyn Roberson, Sam Flood, Rory Dortch, Jason 2017-01-06 application/pdf https://pure.qub.ac.uk/en/publications/younger-dryas-glaciers-and-climate-in-the-mourne-mountains-northern-ireland(7b5b3e5f-f9a3-46d2-8582-f4eba0932290).html https://doi.org/10.1002/jqs.2927 https://pureadmin.qub.ac.uk/ws/files/123200025/Younger_Dryas_glaciers_and_climate_in_the_Mourne_Mountains_Northern_Ireland.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/jqs.2927/full eng eng info:eu-repo/semantics/openAccess Barr , I , Roberson , S , Flood , R & Dortch , J 2017 , ' Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland ' , Journal of Quaternary Science , vol. 32 , no. 1 , pp. 104–115 . https://doi.org/10.1002/jqs.2927 article 2017 ftqueensubelpubl https://doi.org/10.1002/jqs.2927 2022-02-09T22:22:21Z 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. Article in Journal/Newspaper North Atlantic Sea ice Queen's University Belfast Research Portal Ela ENVELOPE(9.642,9.642,63.170,63.170) Journal of Quaternary Science 32 1 104 115 |
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Open Polar |
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Queen's University Belfast Research Portal |
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ftqueensubelpubl |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Barr, Iestyn Roberson, Sam Flood, Rory Dortch, Jason |
spellingShingle |
Barr, Iestyn Roberson, Sam Flood, Rory Dortch, Jason Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland |
author_facet |
Barr, Iestyn Roberson, Sam Flood, Rory Dortch, Jason |
author_sort |
Barr, Iestyn |
title |
Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland |
title_short |
Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland |
title_full |
Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland |
title_fullStr |
Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland |
title_full_unstemmed |
Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland |
title_sort |
younger dryas glaciers and climate in the mourne mountains, northern ireland |
publishDate |
2017 |
url |
https://pure.qub.ac.uk/en/publications/younger-dryas-glaciers-and-climate-in-the-mourne-mountains-northern-ireland(7b5b3e5f-f9a3-46d2-8582-f4eba0932290).html https://doi.org/10.1002/jqs.2927 https://pureadmin.qub.ac.uk/ws/files/123200025/Younger_Dryas_glaciers_and_climate_in_the_Mourne_Mountains_Northern_Ireland.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/jqs.2927/full |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) |
geographic |
Ela |
geographic_facet |
Ela |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
Barr , I , Roberson , S , Flood , R & Dortch , J 2017 , ' Younger Dryas Glaciers and climate in the Mourne Mountains, Northern Ireland ' , Journal of Quaternary Science , vol. 32 , no. 1 , pp. 104–115 . https://doi.org/10.1002/jqs.2927 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/jqs.2927 |
container_title |
Journal of Quaternary Science |
container_volume |
32 |
container_issue |
1 |
container_start_page |
104 |
op_container_end_page |
115 |
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1766131834487308288 |