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 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.
Bard
Edouard
E
Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE), UMR 6635 CNRS, University Aix-Marseille, Institut de Recherche pour le Développement, Collège de France, Europôle de l'Arbois, BP 80, F-13545 Aix-en-Provence Cedex 4, France. bard@cerege.fr
Hamelin
Bruno
B
Delanghe-Sabatier
Doriane
D