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van der Does, Michèlle; Lamy, Frank; Krätschmer, Stephan; Stuut, Jan-Berend W; Völker, Christoph; Werner, Martin; Winckler, Gisela (2023): Grain-size distributions, End-member modelling and Th-fluxes of South Atlantic surface sediments [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.961706

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Published: 2023-10-05 • DOI registered: 2023-11-03

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Abstract:
We present the characteristics of the lithogenic components of seafloor surface sediments covering the entire South Atlantic Ocean (from the equator to Antarctica). These samples were collected by multiple seagoing expeditions between 1988 and 2005. By using end-member modelling on the multi-modal grain-size distributions, we decomposed the lithogenic fraction into a fine- and coarse-grained dust component, current-sorted sediments and IRD. By multiplying these specific components with 230Th-normalized lithogenic fluxes, we obtained specific fluxes for these four fractions. This allows us to study dust deposition over the remote open ocean more specifically.
Keyword(s):
dust; Dust flux; end-member modelling; grain size distribution; IRD; Particle size distribution; South Atlantic; thorium normalization
Supplement to:
van der Does, Michèlle; Lamy, Frank; Krätschmer, Stephan; Stuut, Jan-Berend W; Völker, Christoph; Werner, Martin; Schwarz, Roseanne; Fleisher, Marty; Winckler, Gisela (2024): Late Holocene Dust Deposition Fluxes Over the Entire South Atlantic Ocean. Geochemistry, Geophysics, Geosystems, 25(1), e2023GC011105, https://doi.org/10.1029/2023GC011105
Coverage:
Median Latitude: -40.264187 * Median Longitude: -7.197832 * South-bound Latitude: -69.889000 * West-bound Longitude: -56.810000 * North-bound Latitude: 0.100000 * East-bound Longitude: 28.546670
Date/Time Start: 1988-03-04T00:00:00 * Date/Time End: 2005-05-14T07:09:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
4 datasets

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Datasets listed in this bundled publication

  1. van der Does, M; Lamy, F; Krätschmer, S et al. (2023): Grain-size distributions of South Atlantic surface sediments. https://doi.org/10.1594/PANGAEA.961707
  2. van der Does, M; Lamy, F; Krätschmer, S et al. (2023): End-member grain-size distributions used for calculation of end-member composition of South Atlantic surface sediments. https://doi.org/10.1594/PANGAEA.961710
  3. van der Does, M; Lamy, F; Krätschmer, S et al. (2023): End-member composition of South Atlantic surface sediments. https://doi.org/10.1594/PANGAEA.961711
  4. van der Does, M; Lamy, F; Krätschmer, S et al. (2023): Lithogenic thorium fluxes into South Atlantic surface sediments. https://doi.org/10.1594/PANGAEA.961716