Struve, Torben; Longman, Jack; Zander, Martin; Lamy, Frank; Winckler, Gisela; Pahnke, Katharina (2022): Source apportionment results for <5 μm size fraction sediments of core PS75/056-1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.947019
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Abstract:
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.
Keyword(s):
Supplement to:
Struve, Torben; Longman, Jack; Zander, Martin; Lamy, Frank; Winckler, Gisela; Pahnke, Katharina (2022): Systematic changes in circumpolar dust transport to the Subantarctic Pacific Ocean over the last two glacial cycles. Proceedings of the National Academy of Sciences, 119(47), e2206085119, https://doi.org/10.1073/pnas.2206085119
Funding:
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. 412785502: Glacial - Interglacial Changes in Dust Supply to the Pacific Southern Ocean
Coverage:
Latitude: -55.162330 * Longitude: -114.788500
Date/Time Start: 2009-12-15T03:15:00 * Date/Time End: 2009-12-15T03:15:00
Minimum DEPTH, sediment/rock: 0.030 m * Maximum DEPTH, sediment/rock: 9.925 m
Event(s):
PS75/056-1 * Latitude: -55.162330 * Longitude: -114.788500 * Date/Time: 2009-12-15T03:15:00 * Elevation: -3581.0 m * Recovery: 10.21 m * Location: South Pacific Ocean * Campaign: ANT-XXVI/2 (PS75 BIPOMAC) * Basis: Polarstern * Method/Device: Gravity corer (Kiel type) (SL)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample ID | Sample ID | Struve, Torben | Model ID | ||
| 2 | Sample comment | Sample comment | Struve, Torben | |||
| 3 | Depth, top/min | Depth top | m | Struve, Torben | ||
| 4 | Depth, bottom/max | Depth bot | m | Struve, Torben | ||
| 5 | DEPTH, sediment/rock | Depth sed | m | Struve, Torben | Geocode | |
| 6 | AGE | Age | ka BP | Struve, Torben | Adopted from van der Does et al. (2021) | Geocode |
| 7 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Darling Basin |
| 8 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Lake Eyre Basin |
| 9 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Lake Mungo |
| 10 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Murray Basin |
| 11 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | New Zealand |
| 12 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Total (Australian domain) |
| 13 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | South America >32°S |
| 14 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | South America 24-32°S |
| 15 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | South America 20-24°S |
| 16 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Total (South American domain) |
| 17 | Dust, aeolian | Dust | % | Struve, Torben | Calculated | Total (Southern Africa) |
| 18 | Grain size, mean | Grain size mean | µm | Struve, Torben | Adopted from van der Does et al. (2021) | Mean 2-10 µm |
| 19 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | interpolated | |
| 20 | Iron II, flux | Fe(ll) flux | mg/cm2/ka | Struve, Torben | interpolated | |
| 21 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | Australia |
| 22 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | New Zealand |
| 23 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | Total (Australia + New Zealand) |
| 24 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | South America >32°S |
| 25 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | South America 20-32°S |
| 26 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | Total (South America south of 20°S) |
| 27 | Iron, flux | Fe flux | mg/cm2/ka | Struve, Torben | Calculated | Southern Africa |
| 28 | Comment | Comment | Struve, Torben |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2675 data points
Download Data
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