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

Authors
Type
Published Article
Journal
Science (New York, N.Y.)
Publication Date
Volume
294
Issue
5545
Pages
1328–1331
Identifiers
PMID: 11701925
Source
Medline
License
Unknown

Abstract

Evaluating the significance of Holocene submillennial delta18O 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 delta18O variations that correlate with subtle delta18O 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 delta18O at this ocean margin site.

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