Journal
SCIENCE
Volume 294, Issue 5545, Pages 1328-1331Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1063678
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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.
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