Centennial-Scale Holocene Climate Variability Revealed by a High-Resolution Speleothem δ 18 O Record from SW Ireland

Evaluating the significance of Holocene submillennial δ 18 O 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 evid...

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Bibliographic Details
Published in:Science
Main Authors: McDermott, Frank, Mattey, David P., Hawkesworth, Chris
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2001
Subjects:
Greenland
Greenland ice cores
North Atlantic
Online Access:http://dx.doi.org/10.1126/science.1063678
https://www.science.org/doi/pdf/10.1126/science.1063678
Description
Summary:Evaluating the significance of Holocene submillennial δ 18 O 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 δ 18 O variations that correlate with subtle δ 18 O 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 δ 18 O at this ocean margin site.

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