This dataset is related to the manuscript: "An exceptional record of millennial-scale climate variability in the Southern Iberian margin during MIS 6: Impact on Mediterranean overturning and sapropel formation"

• Main Author: FRANCISCO J. SIERRO
• Format: Dataset
• Language: unknown
• Published: Mendeley 2022
• Subjects: Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.17632/ftm7dv42dp.1; https://data.mendeley.com/datasets/ftm7dv42dp/1

This dataset contains oxygen isotope measurements in the planktic foraminifer species Globigerina bulloides and oxygen and carbon isotopes in the benthic foraminifer Cibicidoides pachyderma from IODP Site U1389 (South Iberian Margin) for the penultimate glacial period. Data of the percentage of fine sand content in the sediments from the same Site is also provided. The high resolution oxygen isotope record obtained in the planktic foraminifer species led to recognize millennial-scale climate variability during the penultimate glacial period with unprecedented resolution that could be correlated with similar records from core MD01-2444 in the western Portuguese margin and Antarctic hydrogen isotopes from Epica Dome C. A series of stadial interstadial episodes were regognized that were similar to the Dansgaard-Oestchger events during the last glacial period. Unlike the planktic d18O record that mainly reflects sea surface temperature variability in the NE Atlantic, the Cibicidoides pachyderma benthic foraminifer stable isotope record reflects millennial-scale climate variability in the Mediterranean. Changes in the percent fine sand (weight% of the fine sand fraction 62-150 microns relative to dry bulk weight) was used as a proxy for the strength of the Mediterranean Overflow Water (MOW)