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  • AEOLD; Aeolian dust sample; ALTITUDE; Calculated, see reference(s); Carbon number of the homologue with highest abundance; Carbon Preference Index, n-Alkanes (C25-C33); D1; D10; D11; D12; D13; D14; D15; D16; D17; D18; D19; D20; D21; D22; D23; D24; D25; D3; D4; D5; D6; D7; D8; D9; Event label; Gas chromatography - Mass spectrometry (GC-MS); GeoB; Geosciences, University of Bremen; Latitude of event; Longitude of event; 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_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; Meteor (1986); n-Alkane, average chain length; n-Alkane, C31/(C29+C31) ratio; n-Alkane, detected carbon number range; n-Alkane C24, δ13C; n-Alkane C25, δ13C; n-Alkane C26, δ13C; n-Alkane C27, δ13C; n-Alkane C28, δ13C; n-Alkane C29, δ13C; n-Alkane C30, δ13C; n-Alkane C31, δ13C; n-Alkane C32, δ13C; n-Alkane C33, δ13C; n-Alkane C4 plant; n-Alkane weighted mean, δ13C  (1)
  • GeoB; Geosciences, University of Bremen; NIOZ89; PC; Piston corer; SFB261; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Southeast Atlantic; T89-16; T89-16-PC; Tyro  (1)
  • Mittelpleistozän  (1)
  • (C23+C25)/(C23+C25+C29+C31) n-alkanes ratio; AGE; DEPTH, sediment/rock; Ice volume corrected; MF4-12; Mfabeni peatland; n-Alkane C29-C31, δ13C, standard error; n-Alkane C29-C31, δD, standard error; n-Alkane C29-C31 weighted mean, δ13C; n-Alkane C29-C31 weighted mean, δD; VC; Vibro corer
  • 053-1; 054-2; 055-1; 056-3; 057-2; 063-2; 064-2; 065-2; 067-2; 075-2; 076-1; 078-3; 086-1; 088-2; Aluminium/Silicon ratio; AMADEUS; Amazon Basin; Amazon Shelf/Fan; Amazon Submarine Delta; BC; BC14; BC17; BC24; BC3; BC44C; BC50; BC55; BC61; BC71; Bc75; BC80; Bc82; BC90; Box corer; Carbon, organic, total; Center for Marine Environmental Sciences; Cinnamyl phenols/vanillyl phenols ratio; Continental Slope Northeast Brazil; DEPTH, sediment/rock; Element analyser CS, LECO CS-200; Event label; French Guiana; GeoB16202-1; GeoB16203-2; GeoB16204-1; GeoB16205-3; GeoB16206-2; GeoB16209-2; GeoB16210-2; GeoB16211-2; GeoB16212-2; GeoB16216-2; GeoB16217-1; GeoB16218-3; GeoB16223-1; GeoB16225-2; Grain size, mean; Knorr; KNR197-4; KNR197-4-12MC; KNR197-4-14BC; KNR197-4-17BC; KNR197-4-24BC; KNR197-4-33MC; KNR197-4-3BC; KNR197-4-44cBC; KNR197-4-50BC; KNR197-4-55BC; KNR197-4-61BC; KNR197-4-6AMC; KNR197-4-71BC; KNR197-4-75BC; KNR197-4-80BC; KNR197-4-82BC; KNR197-4-90BC; Latitude of event; Lignin, per unit mass organic carbon; Lignin per unit sediment mass; Location; Longitude of event; Maria S. Merian; MARUM; MC12; MC33; MC6A; MSM20/3; MUC; MultiCorer; Sample code/label; Syringic acid/syringaldehyde ratio; Syringyl phenols/vanillyl phenols ratio; Vanillic acid/vanillin ratio; δ13C, organic carbon
  • 2000-2004  (3)
Document type
Keywords
Publisher
Language
Years
Year
  • 1
    Book
    Book
    Paleo-environmental effects of the Mid-Pleistocene transition in the tropical Atlantic and equatorial Africa : = Mileu-veranderingen in de tropische Atlantische Oceaan en equatoriaal Afrika tijdens de Midden-Pleistocene klimaatsovergang (2003)
    Utrecht : Univ.
    Details Availability
    Keywords: climate change ; Dissertation ; Pleistocene ; environmental change ; Atlantic Ocean ; Africa ; Hochschulschrift ; Paläoklimatologie ; Mittelpleistozän ; Tropenklima ; Atlantischer Ozean Süd ; Zentralafrika
    Type of Medium: Book
    Pages: 187 S , graph. Darst., Kt
    ISBN: 9057440814
    Series Statement: Geologica Ultraiectina 223
    Language: English
    Note: Zsfassung in niederländ. und dt. Sprache , Zugl.: Utrecht, Univ., Diss., 2003
    Location Call Number Limitation Availability
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  • 2
    facet.materialart.
    Unknown
    Age determination of Southeast Atlantic sediment cores (2004)
    PANGAEA
    In:  Supplement to: Versteegh, Gerard J M; Schefuß, Enno; Dupont, Lydie M; Marret, Fabienne; Sinninghe Damsté, Jaap S; Jansen, J H Fred (2004): Taraxerol and Rhizophora pollen as proxies for tracking past mangrove ecosystems. Geochimica et Cosmochimica Acta, 68(3), 411-422, https://doi.org/10.1016/S0016-7037(03)00456-3
    Details
    Publication Date: 2023-10-21
    Description: Angola Basin and Cape Basin (southeast Atlantic) surface sediments and sediment cores show that maxima in the abundance of taraxerol (relative to other land-derived lipids) covary with maxima in the relative abundance of pollen from the mangrove tree genus Rhizophora and that in the surface sediments offshore maxima in the relative abundance of taraxerol occur at latitudes with abundant coastal mangrove forests. Together with the observation that Rhizophora mangle and Rhizophora racemosa leaves are extraordinarily rich in taraxerol, this strongly indicates that taraxerol can be used as a lipid biomarker for mangrove input to the SE Atlantic. The proxy-environment relations for taraxerol and Rhizophora pollen down-core show that increased taraxerol and Rhizophora pollen abundances occur during transgressions and periods with a humid climate. These environmental changes modify the coastal erosion and sedimentation patterns, enhancing the extent of the mangrove ecosystem and/or the transport of mangrove organic matter offshore. Analyses of mid-Pleistocene sediments show that interruption of the pattern of taraxerol maxima during precession minima occurs almost only during periods of low obliquity. This demonstrates the complex environmental response of the interaction between precession-related humidity cycles and obliquity-related sea-level changes on mangrove input.
    Keywords: GeoB; Geosciences, University of Bremen; NIOZ89; PC; Piston corer; SFB261; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Southeast Atlantic; T89-16; T89-16-PC; Tyro
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Stable carbon isotopic analyses of n-alkanes and the calculated C4 plant-derived fractions in the dust samples (2003)
    PANGAEA
    In:  Supplement to: Schefuß, Enno; Ratmeyer, Volker; Stuut, Jan-Berend W; Jansen, J H Fred; Sinninghe Damsté, Jaap S (2003): Carbon isotope analyses of n-alkanes in dust from the lower atmosphere over the central eastern Atlantic. Geochimica et Cosmochimica Acta, 67(10), 1757-1767, https://doi.org/10.1016/S0016-7037(02)01414-X
    Details
    Publication Date: 2024-02-14
    Description: Atmospheric dust samples collected along a transect off the West African coast have been investigated for their lipid content and compound-specific stable carbon isotope compositions. The saturated hydrocarbon fractions of the organic solvent extracts consist mainly of long-chain n-alkanes derived from epicuticular wax coatings of terrestrial plants. Backward trajectories for each sampling day and location were calculated using a global atmospheric circulation model. The main atmospheric transport took place in the low-level trade-wind layer, except in the southern region, where long-range transport in the mid-troposphere occurred. Changes in the chain length distributions of the n-alkane homologous series are probably related to aridity, rather than temperature or vegetation type. The carbon preference of the leaf-wax n-alkanes shows significant variation, attributed to a variable contribution of fossil fuel- or marine-derived lipids. The effect of this nonwax contribution on the d13C values of the two dominant n-alkanes in the aerosols, n-C29 and n-C31 alkane, is, however, insignificant. Their d13C values were translated into a percentage of C4 vs. C3 plant type contribution, using a two-component mixing equation with isotopic end-member values from the literature. The data indicate that only regions with a predominant C4 type vegetation, i.e. the Sahara, the Sahel, and Gabon, supply C4 plant-derived lipids to dust organic matter. The stable carbon isotopic compositions of leaf-wax lipids in aerosols mainly reflect the modern vegetation type along their transport pathway. Wind abrasion of wax particles from leaf surfaces, enhanced by a sandblasting effect, is most probably the dominant process of terrigenous lipid contribution to aerosols.
    Keywords: AEOLD; Aeolian dust sample; ALTITUDE; Calculated, see reference(s); Carbon number of the homologue with highest abundance; Carbon Preference Index, n-Alkanes (C25-C33); D1; D10; D11; D12; D13; D14; D15; D16; D17; D18; D19; D20; D21; D22; D23; D24; D25; D3; D4; D5; D6; D7; D8; D9; Event label; Gas chromatography - Mass spectrometry (GC-MS); GeoB; Geosciences, University of Bremen; Latitude of event; Longitude of event; 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_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; Meteor (1986); n-Alkane, average chain length; n-Alkane, C31/(C29+C31) ratio; n-Alkane, detected carbon number range; n-Alkane C24, δ13C; n-Alkane C25, δ13C; n-Alkane C26, δ13C; n-Alkane C27, δ13C; n-Alkane C28, δ13C; n-Alkane C29, δ13C; n-Alkane C30, δ13C; n-Alkane C31, δ13C; n-Alkane C32, δ13C; n-Alkane C33, δ13C; n-Alkane C4 plant; n-Alkane weighted mean, δ13C
    Type: Dataset
    Format: text/tab-separated-values, 350 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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