Centennial-scale holocene climate variability revealed by a high-resolution speleothem delta O-18 record from SW Ireland

Evaluating the significance of Holocene submillennial delta O-18 variability in the Greenland ice cores is crucial for understanding how natural climate oscillations may modulate future anthropogenic warming. A high-resolution oxygen isotope record from a speleothem in southwestern Ireland provides...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2001-11, Vol.294 (5545), p.1328-1331
Main Authors: McDermott, F, Mattey, D P, Hawkesworth, C
Format: Article
Language:English
Online Access:Get full text
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Summary:Evaluating the significance of Holocene submillennial delta O-18 variability in the Greenland ice cores is crucial for understanding how natural climate oscillations may modulate future anthropogenic warming. A high-resolution oxygen isotope record from a speleothem in southwestern Ireland provides evidence for centennial-scale delta O-18 variations that correlate with subtle delta O-18 changes in the Greenland ice cores, indicating regionally coherent variability in the early Holocene. Evidence for previously undetected early Holocene cooling events is presented, but mid- to late-Holocene ice rafting in the North Atlantic appears to have had little impact on delta O-18 at this ocean margin site. (Author)
ISSN:0036-8075
DOI:10.1126/science.1063678