Concentrations of export production indicators and corrected and non-corrected accumulation rates of indicators of opal, Carbonates, Fe, TOC and Barium excess from core PS97/093-2 over the past 1.4 Ma


Studying oceanic particle fluxes from sediment records is an important component of paleoceanography. Traditionally, we calculate these fluxes using a combination of linear sedimentation rates derived from age models and sediment density, known as age model-derived bulk mass accumulation rates (BMAR). However, BMAR and the resulting paleoceanographic interpretations may suffer from substantial errors if lateral redistribution of sediments is not considered. In fact, this is expected to be a common phenomenon in the Southern Ocean due to the strong bottom water circulation induced by the Antarctic Circumpolar Current. In the study associated to this dataset, we assess export production and its drivers over the past ~1.4 Myr near the Drake Passage entrance using BMAR of biogenic Barium, organic carbon, biogenic opal, calcium carbonate, and iron from sediment core PS97/093-2, all of which are corrected for lateral sediment redistribution (corr-BMAR). To quantify this correction, we explore the relationship between sortable silt as a bottom current strength proxy and 230Th-derived focusing factors as indicators of lateral redistribution of sediments, respectively. Therefore, this dataset includes the following data: Concentrations of export production indicators (opal, Carbonates, Fe, total organic carbon, and excess of Barium), dry bulk density, sortable silt (averaged between tie points), calculated focusing factors, and corrected and non-corrected accumulation rates of export production indicators of core PS97/093-2 over the past 1.4 million years.

Metadata Access
Creator Toyos, Maria H ORCID logo; Lamy, Frank ORCID logo; Lange, Carina Beatriz ORCID logo; Abell, Jordan T ORCID logo; Lembke-Jene, Lester ORCID logo; Arz, Helge Wolfgang ORCID logo; Winckler, Gisela
Publisher PANGAEA
Publication Year 2024
Funding Reference Austral University of Chile Crossref Funder ID 1500003 FONDAP-IDEAL; German Research Foundation Crossref Funder ID 390741603 EXC 2077: The Ocean Floor – Earth's Uncharted Interface
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints);
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 4284 data points
Discipline Earth System Research
Spatial Coverage (-70.275 LON, -57.499 LAT); South Pacific Ocean