Deglacial Meltwater Pulse 1B and Younger Dryas Sea Levels Revisited with Boreholes at Tahiti

Reconstructing sea-level changes during the last deglaciation provides a way of understanding the ice dynamics that can perturb large continental ice sheets. The resolution of the few sea-level records covering the critical time interval between 14,000 and 9,000 calendar years before the present is...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2010-03, Vol.327 (5970), p.1235-1237
Main Authors: Bard, Edouard, Hamelin, Bruno, Delanghe-Sabatier, Doriane
Format: Article
Language:English
Subjects:
Climate change
Coral reefs
Corals
Coring
Deglaciation
Discontinuity
Dynamics
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geological time
Glaciers
Ice ages
Ice sheets
Intervals
Marine
Marine and continental quaternary
Meltwater
Oceans
Paleoclimate science
Paleoclimatology
Reefs
Sea level
Sea level rise
Surficial geology
Time windows
Younger Dryas period
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Summary:Reconstructing sea-level changes during the last deglaciation provides a way of understanding the ice dynamics that can perturb large continental ice sheets. The resolution of the few sea-level records covering the critical time interval between 14,000 and 9,000 calendar years before the present is still insufficient to draw conclusions about sea-level changes associated with the Younger Dryas cold event and the meltwater pulse 1B (MWP-1B). We used the uranium-thorium method to date shallow-living corals from three new cores drilled onshore in the Tahiti barrier reef. No significant discontinuity can be detected in the sea-level rise during the MWP-1B period. The new Tahiti sea-level record shows that the sea-level rise slowed down during the Younger Dryas before accelerating again during the Holocene.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1180557