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Publication . Article . Other literature type . 2017

Exploring the oxygen isotope fingerprint of Dansgaard-Oeschger variability and Heinrich events

Witold Bagniewski; Katrin J. Meissner; Laurie Menviel;
Open Access
Published: 01 Mar 2017 Journal: Quaternary Science Reviews, volume 159, pages 1-14 (issn: 0277-3791, Copyright policy )
Publisher: Elsevier BV
Country: France

Abstract We present the first transient simulations of Marine Isotope Stage 3 (MIS 3) performed with an oxygen isotope-enabled climate model. Our simulations span several Dansgaard-Oeschger cycles and three Heinrich stadials and are directly compared with oxygen isotope records from 13 sediment and 2 ice cores. Our results are consistent with a 30–50% weakening of the Atlantic Meridional Overturning Circulation during Dansgaard-Oeschger stadials and a complete shutdown during Heinrich stadials. We find that the simulated δ 18 O anomalies differ significantly between Heinrich stadials and non-Heinrich stadials. This difference is mainly due to different responses in ocean circulation, and therefore climate, impacting oceanic δ 18 O, while the volume of 18 O-depleted meltwater plays a secondary role.

Subjects by Vocabulary

Microsoft Academic Graph classification: Isotopes of oxygen Marine isotope stage Oceanography Ice core Sediment Geology Ocean current Climate model Stadial Meltwater


Global and Planetary Change, Geology, Ecology, Evolution, Behavior and Systematics, Archeology, MIS3, Model-data comparison, Heinrich events, Dansgaard-Oeschger cycles, delta O-18, AMOC

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