Source apportionment results for <5 μm size fraction sediments of core PS75/056-1

This dataset contains the source apportionment results for the dust fraction (<5 µm size fraction) of sediment core PS75/056-1 from the South Pacific Subantarctic Zone (55.16°S, 114.78°W; 3581 m water depth) collected during R/V Polarstern expedition ANT-XXVI/2 (PS75 BIPOMAC) in 11/2009-01/2010 (...

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Bibliographic Details
Main Authors: Struve, Torben, Longman, Jack, Zander, Martin, Lamy, Frank, Winckler, Gisela, Pahnke, Katharina
Format: Dataset
Language:English
Published: PANGAEA 2022
Subjects:
Adopted from van der Does et al. (2021)
AGE
ANT-XXVI/2
Calculated
Comment
Depth
bottom/max
sediment/rock
top/min
Dust
aeolian
Dust provenance
Grain size
mean
Gravity corer (Kiel type)
interpolated
Iron
flux
Iron fluxes
Iron II
Polarstern
PS75/056-1
PS75 BIPOMAC
Radiogenic isotopes
Rare earth elemets
Sample comment
Sample ID
SL
Southern Hemisphere Westerly Winds
Southern Ocean
South Pacific Ocean
Pacific
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.947019
https://doi.org/10.1594/PANGAEA.947019
Description
Summary:This dataset contains the source apportionment results for the dust fraction (<5 µm size fraction) of sediment core PS75/056-1 from the South Pacific Subantarctic Zone (55.16°S, 114.78°W; 3581 m water depth) collected during R/V Polarstern expedition ANT-XXVI/2 (PS75 BIPOMAC) in 11/2009-01/2010 (Gersonde, 2011, doi:10.2312/BzPM_0632_2011). The original lithogenic dust provenance signal was extracted from a total of 108 samples (incl. 13 full replicates) between 0.03 and 9.93 m core depth covering the period from ~8,000 to ~260,000 years before present. The age model is from van der Does et al. (2021, doi:10.1016/j.quascirev.2021.106978). The source apportionment was calculated using PS75/056-1 dust fraction radiogenic isotope compositions (doi:10.1594/PANGAEA.947018) and the Bayesian mixing model MixSIAR (Longman et al, 2018, doi:10.1038/s41598-018-24474-0; Stock et al., 2018, doi:10.7717/peerj.5096). Mean values of dust grain size reported together with the source apportionment results were previously published by van der Does et al. (2021, doi:10.1016/j.quascirev.2021.106978)). Iron (Fe) and Fe(II) flux data for PS75/056-1 (Shoenfelt et al., 2018, doi:10.1073/pnas.1809755115) were interpolated linearly to obtain values for the depths sampled for dust provenance work. The source-specific fluxes were calculated based on the relative contributions of the individual dust source regions to the total Fe input.

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