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


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

NATURE COMMUNICATIONS, pp.1-8, 2024 (SCI-Expanded)

  • Publication Type: Article / Article
  • Publication Date: 2024
  • Doi Number: 10.1038/s41467-024-45507-5
  • Journal Name: NATURE COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, CAB Abstracts, Chemical Abstracts Core, Geobase, INSPEC, MEDLINE, Veterinary Science Database, Directory of Open Access Journals
  • Page Numbers: pp.1-8
  • Akdeniz University Affiliated: Yes

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.