Toyos, Maria H; Lamy, Frank; Lange, Carina Beatriz; Abell, Jordan T; Lembke-Jene, Lester; Arz, Helge Wolfgang; Winckler, Gisela: 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 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.968898 (dataset in review)
Abstract:
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.
Keyword(s):
Related to:
Toyos, Maria H; Lamy, Frank; Lange, Carina; Abell, Jordan T; Lembke-Jene, Lester; Arz, Helge Wolfgang; Winckler, Gisela (submitted): A new perspective on past export production in the subantarctic South Pacific for the last ~1.4 Myr. Paleoceanography and Paleoclimatology
Project(s):
Changing Earth – Sustaining our Future (Helmholtz_ChangingEarth)
Funding:
German Research Foundation (DFG), grant/award no. 390741603: EXC 2077: The Ocean Floor – Earth's Uncharted Interface
Coverage:
Latitude: -57.499170 * Longitude: -70.274670
Date/Time Start: 2016-03-20T17:30:00 * Date/Time End: 2016-03-20T17:30:00
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 16.38 m
Event(s):
PS97/093-2 * Latitude: -57.499170 * Longitude: -70.274670 * Date/Time: 2016-03-20T17:30:00 * Elevation: -3782.2 m * Recovery: 16.45 m * Location: South Pacific Ocean * Campaign: PS97 (ANT-XXXI/3) * Basis: Polarstern * Method/Device: Piston corer (PC)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
4284 data points
Download Data (login required)
View dataset as HTML (shows only first 2000 rows)