Dansgaard-Oeschger cycles of the penultimate and last glacial period recorded in stalagmites from Türkiye

F. Held, H. Cheng, R. L. Edwards, O. Tüysüz, K. Koç, D. Fleitmann

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6 Scopus citations

Abstract

The last glacial period is characterized by abrupt climate oscillations, also known as Dansgaard-Oeschger (D-O) cycles. However, D-O cycles remain poorly documented in climate proxy records covering the penultimate glacial period. Here we present highly resolved and precisely dated speleothem time series from Sofular Cave in northern Türkiye to provide clear evidence for D-O cycles during Marine Isotope Stage (MIS) 6 as well as MIS 2-4. D-O cycles are most clearly expressed in the Sofular carbon isotope time series, which correlate inversely with regional sea surface temperature (SST) records from the Black Sea. The pacing of D-O cycles is almost twice as long during MIS 6 compared to MIS 2-4, and could be related to a weaker Atlantic Meridional Overturning Circulation (AMOC) and a different mean climate during MIS 6 compared to MIS 2-4, leading most likely to a higher threshold for the occurrence of D-O cycles.

Original languageEnglish (US)
Article number1183
JournalNature communications
Volume15
Issue number1
DOIs
StatePublished - Dec 2024
Externally publishedYes

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© The Author(s) 2024.

PubMed: MeSH publication types

  • Journal Article

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