Authigenic neodymium isotope data of sediment cores from the deep South Atlantic


Here, we present neodymium isotope data (εNd) from three sediment cores from the Atlantic sector of the Southern Ocean (SO) to assess the distribution of water masses during the past 150 ka. The cores are located south of the modern polar frontal zone, building a vertical transect within the modern mixing zone of Circumpolar Deep Water and Antarctic Bottom Water. The data reveals a tremendous εNd variability, which reflects mainly water mass changes during climate transitions. It resolves systematic glacial-interglacial variations in the deep-water composition with strong evidence of a persistent admixture of Pacific sourced water into the SO during the past 150 ka which is the strongest during times of peak glacial ice extent. Mass spectrometric Nd isotope measurements were performed at the Institute of Environmental Physics multicollector ICPMS facility in Heidelberg, which hosts a ThermoFisher Neptuneplus MC-ICPMS coupled with an APEX HF desolvating system and an ESI-SC autosampler.

Metadata Access
Creator Hallmaier, Moritz ORCID logo; Rückert, Eva M; Link, Jasmin M ORCID logo; Lütkes, Laura; Frank, Norbert ORCID logo
Publisher PANGAEA
Publication Year 2024
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints);
OpenAccess false
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 3 datasets
Discipline Earth System Research
Spatial Coverage (4.476W, -53.181S, 5.866E, -49.977N)
Temporal Coverage Begin 1989-11-11T21:40:00Z
Temporal Coverage End 1998-01-22T12:10:00Z