GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 175-1077B; Accumulation rate, mass; AGE; Benguela Current, South Atlantic Ocean; Calculated, see reference(s); Carbon Preference Index, n-Alkanes (C25-C33); Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Gas chromatography - Mass spectrometry (GC-MS); GeoB; Geosciences, University of Bremen; Intercore correlation; Joides Resolution; Leg175; n-Alkane, average chain length; n-Alkane, C31/(C29+C31) ratio; n-Alkane C25-C35, flux; n-Alkane C29, δ13C; n-Alkane C31, δ13C; n-Alkane C4 plant, reference to C29; n-Alkane C4 plant, reference to C31; Ocean Drilling Program; ODP; Sample code/label; Sum n-alkanes C25-C35; Sum odd numbered n-alkanes C25-C35; Sum odd numbered n-alkanes C25-C35, flux  (1)
  • AEOLD; Aeolian dust sample; Center for Marine Environmental Sciences; D1; D10; D11; D12; D13; D14; D15; D16; D17; D18; D19; D20; D21; D22; D23; D24; D25; D3; D4; D5; D6; D7; D8; D9; GeoB; Geosciences, University of Bremen; M41/1; M41/1_D1; M41/1_D10; M41/1_D11; M41/1_D12; M41/1_D13; M41/1_D14; M41/1_D15; M41/1_D16; M41/1_D17; M41/1_D18; M41/1_D19; M41/1_D2; M41/1_D20; M41/1_D21; M41/1_D22; M41/1_D23; M41/1_D24; M41/1_D25; M41/1_D3; M41/1_D4; M41/1_D5; M41/1_D6; M41/1_D7; M41/1_D8; M41/1_D9; MARUM; Meteor (1986)  (1)
  • 2005-2009  (1)
  • 2000-2004  (1)
Document type
Keywords
Publisher
Years
  • 2005-2009  (1)
  • 2000-2004  (1)
Year
  • 1
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Schefuß, Enno; Schouten, Stefan; Jansen, J H Fred; Sinninghe Damsté, Jaap S (2003): African vegetation controlled by tropical sea surface temperatures in the mid-Pleistocene period. Nature, 422(6930), 418-421, https://doi.org/10.1038/nature01500
    Publication Date: 2024-02-14
    Description: The dominant forcing factors for past large-scale changes in vegetation are widely debated. Changes in the distribution of C4 plants-adapted to warm, dry conditions and low atmospheric CO2 concentrations (Collatz et al., 1998, doi:10.1007/s004420050468) -have been attributed to marked changes in environmental conditions, but the relative impacts of changes in aridity, temperature (Pagani et al., 1999, doi:10.1126/science.285.5429.876; Huang et al., 2001, doi:10.1126/science.1060143) and CO2 concentration (Cerling et al., 1993, doi:10.1038/361344a0; Kuypers et al., 1999, doi:10.1038/20659) are not well understood. Here, we present a record of African C4 plant abundance between 1.2 and 0.45 million years ago, derived from compound-specific carbon isotope analyses of wind-transported terrigenous plant waxes. We find that large-scale changes in African vegetation are linked closely to sea surface temperatures in the tropical Atlantic Ocean. We conclude that, in the mid-Pleistocene, changes in atmospheric moisture content - driven by tropical sea surface temperature changes and the strength of the African monsoon - controlled aridity on the African continent, and hence large-scale vegetation changes.
    Keywords: 175-1077B; Accumulation rate, mass; AGE; Benguela Current, South Atlantic Ocean; Calculated, see reference(s); Carbon Preference Index, n-Alkanes (C25-C33); Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Gas chromatography - Mass spectrometry (GC-MS); GeoB; Geosciences, University of Bremen; Intercore correlation; Joides Resolution; Leg175; n-Alkane, average chain length; n-Alkane, C31/(C29+C31) ratio; n-Alkane C25-C35, flux; n-Alkane C29, δ13C; n-Alkane C31, δ13C; n-Alkane C4 plant, reference to C29; n-Alkane C4 plant, reference to C31; Ocean Drilling Program; ODP; Sample code/label; Sum n-alkanes C25-C35; Sum odd numbered n-alkanes C25-C35; Sum odd numbered n-alkanes C25-C35, flux
    Type: Dataset
    Format: text/tab-separated-values, 2492 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Stuut, Jan-Berend W; Zabel, Matthias; Ratmeyer, Volker; Helmke, Peer; Schefuß, Enno; Lavik, Gaute; Schneider, Ralph R (2005): Provenance of present-day eolian dust collected off NW Africa. Journal of Geophysical Research: Atmospheres, 110, D04202, https://doi.org/10.1029/2004JD005161
    Publication Date: 2024-02-02
    Description: Atmospheric dust samples collected along a transect off the West African coast have been investigated for their physical (grain-size distribution), mineralogical, and chemical (major elements) composition. On the basis of these data the samples were grouped into sets of samples that most likely originated from the same source area. In addition, shipboard-collected atmospheric meteorological data, modeled 4-day back trajectories for each sampling day and location, and Total Ozone Mapping Spectrometer aerosol index data for the time period of dust collection (February-March 1998) were combined and used to reconstruct the sources of the groups of dust samples. On the basis of these data we were able to determine the provenance of the various dust samples. It appears that the bulk of the wind-blown sediments that are deposited in the proximal equatorial Atlantic Ocean are transported in the lower level (〉~900 hPa) NE trade wind layer, which is a very dominant feature north of the Intertropical Convergence Zone (ITCZ). However, south of the surface expression of the ITCZ, down to 5°S, where surface winds are southwesterly, we still collected sediments that originated from the north and east, carried there by the NE trade wind layer, as well as by easterly winds from higher altitudes. The fact that the size of the wind-blown dust depends not only on the wind strength of the transporting agent but also on the distance to the source hampers a direct comparison of the dust's size distributions and measured wind strengths. However, a comparison between eolian dust and terrigenous sediments collected in three submarine sediment traps off the west coast of NW Africa shows that knowledge of the composition of eolian dust is a prerequisite for the interpretation of paleorecords obtained from sediment cores in the equatorial Atlantic.
    Keywords: AEOLD; Aeolian dust sample; Center for Marine Environmental Sciences; D1; D10; D11; D12; D13; D14; D15; D16; D17; D18; D19; D20; D21; D22; D23; D24; D25; D3; D4; D5; D6; D7; D8; D9; GeoB; Geosciences, University of Bremen; M41/1; M41/1_D1; M41/1_D10; M41/1_D11; M41/1_D12; M41/1_D13; M41/1_D14; M41/1_D15; M41/1_D16; M41/1_D17; M41/1_D18; M41/1_D19; M41/1_D2; M41/1_D20; M41/1_D21; M41/1_D22; M41/1_D23; M41/1_D24; M41/1_D25; M41/1_D3; M41/1_D4; M41/1_D5; M41/1_D6; M41/1_D7; M41/1_D8; M41/1_D9; MARUM; Meteor (1986)
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...