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  • Ocean Drilling Program; ODP  (2)
  • (9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon; (9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, per unit mass total organic carbon; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, δ13C; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, δ13C, standard deviation; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; ANT-XXXI/3; Bransfield Strait; Calculated; DEPTH, sediment/rock; Drake Passage; Elevation of event; Event label; Gas chromatography - Mass spectrometry (GC-MS); GBG; GC; Giant box corer; Giant box grab; GKG; Gravity corer; Latitude of event; Longitude of event; MUC; MultiCorer; Phytoplankton biomarker Brassicasterol IPSO25 index; Phytoplankton biomarker Dinosterol IPSO25 index; Phytoplankton biomarker HBI E-Triene IPSO25 index; Phytoplankton biomarker HBI Z-Triene IPSO25 index; Polarstern; PS97; PS97/042-1; PS97/044-1; PS97/045-1; PS97/046-6; PS97/048-1; PS97/049-2; PS97/052-3; PS97/053-1; PS97/054-2; PS97/056-1; PS97/059-1; PS97/060-1; PS97/061-1; PS97/062-1; PS97/065-2; PS97/067-2; PS97/068-2; PS97/069-1; PS97/072-2; PS97/073-2; PS97/074-1; PS97/077-1; PS97/079-1; PS97/080-2; PS97/083-1; PS97/084-2; Satellite derived; Scotia Sea; Sea ice concentration, autumn; Sea ice concentration, autumn, standard deviation; Sea ice concentration, spring; Sea ice concentration, spring, standard deviation; Sea ice concentration, summer; Sea ice concentration, summer, standard deviation; Sea ice concentration, winter; Sea ice concentration, winter, standard deviation  (1)
  • Pleistocene
Publikationsart
Schlagwörter
Verlag/Herausgeber
Sprache
Erscheinungszeitraum
  • 1
    Buch
    Buch
    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 Verfügbarkeit
    Schlagwort(e): climate change ; Dissertation ; Pleistocene ; environmental change ; Atlantic Ocean ; Africa ; Hochschulschrift ; Paläoklimatologie ; Mittelpleistozän ; Tropenklima ; Atlantischer Ozean Süd ; Zentralafrika
    Materialart: Buch
    Seiten: 187 S , graph. Darst., Kt
    ISBN: 9057440814
    Serie: Geologica Ultraiectina 223
    Sprache: Englisch
    Anmerkung: Zsfassung in niederländ. und dt. Sprache , Zugl.: Utrecht, Univ., Diss., 2003
    Standort Signatur Einschränkungen Verfügbarkeit
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    GEOMAR KATALOG
    Link zum Bibliothekskatalog
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  • 2
    facet.materialart.
    Unbekannt
    Highly branched isoprenoids and sterols in surface sedimentsfrom southern Drake Passage and the Bransfield Strait, Antarctic Peninsula, sampled during POLARSTERN cruise PS97 (ANT-XXXI/3) (2019)
    PANGAEA
    Details
    Publikationsdatum: 2023-06-27
    Schlagwort(e): (9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon; (9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, per unit mass total organic carbon; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, δ13C; 2,10,14-Trimethyl-6-enyl-7-(3-methylpent-1-enyl)pentadecene, δ13C, standard deviation; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; ANT-XXXI/3; Bransfield Strait; Calculated; DEPTH, sediment/rock; Drake Passage; Elevation of event; Event label; Gas chromatography - Mass spectrometry (GC-MS); GBG; GC; Giant box corer; Giant box grab; GKG; Gravity corer; Latitude of event; Longitude of event; MUC; MultiCorer; Phytoplankton biomarker Brassicasterol IPSO25 index; Phytoplankton biomarker Dinosterol IPSO25 index; Phytoplankton biomarker HBI E-Triene IPSO25 index; Phytoplankton biomarker HBI Z-Triene IPSO25 index; Polarstern; PS97; PS97/042-1; PS97/044-1; PS97/045-1; PS97/046-6; PS97/048-1; PS97/049-2; PS97/052-3; PS97/053-1; PS97/054-2; PS97/056-1; PS97/059-1; PS97/060-1; PS97/061-1; PS97/062-1; PS97/065-2; PS97/067-2; PS97/068-2; PS97/069-1; PS97/072-2; PS97/073-2; PS97/074-1; PS97/077-1; PS97/079-1; PS97/080-2; PS97/083-1; PS97/084-2; Satellite derived; Scotia Sea; Sea ice concentration, autumn; Sea ice concentration, autumn, standard deviation; Sea ice concentration, spring; Sea ice concentration, spring, standard deviation; Sea ice concentration, summer; Sea ice concentration, summer, standard deviation; Sea ice concentration, winter; Sea ice concentration, winter, standard deviation
    Materialart: Dataset
    Format: text/tab-separated-values, 445 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 3
    facet.materialart.
    Unbekannt
    XRF scanning, pollen and spores of ODP Site 108-659 (2014)
    PANGAEA
    In:  Supplement to: Vallé, Francesca; Dupont, Lydie M; Leroy, Suzanne A G; Schefuß, Enno; Wefer, Gerold (2014): Pliocene environmental change in West Africa and the onset of strong NE trade winds (ODP Sites 659 and 658). Palaeogeography, Palaeoclimatology, Palaeoecology, 414, 403-414, https://doi.org/10.1016/j.palaeo.2014.09.023
    Details
    Publikationsdatum: 2024-01-09
    Beschreibung: Pliocene vegetation dynamics and climate variability in West Africa have been investigated through pollen and XRF-scanning records obtained from sediment cores of ODP Site 659 (18°N, 21°W). The comparison between total pollen accumulation rates and Ti/Ca ratios, which is strongly correlated with the dust input at the site, showed elevated aeolian transport of pollen during dusty periods. Comparison of the pollen records of ODP Site 659 and the nearby Site 658 resulted in a robust reconstruction of West African vegetation change since the Late Pliocene. Between 3.6 and 3.0 Ma the savannah in West Africa differed in composition from its modern counterpart and was richer in Asteraceae, in particular of the Tribus Cichorieae. Between 3.24 and 3.20 Ma a stable wet period is inferred from the Fe/K ratios, which could stand for a narrower and better specified mid-Pliocene (mid-Piacenzian) warm time slice. The northward extension of woodland and savannah, albeit fluctuating, was generally greater in the Pliocene. NE trade wind vigour increased intermittently around 2.7 and 2.6 Ma, and more or less permanently since 2.5 Ma, as inferred from increased pollen concentrations of trade wind indicators (Ephedra, Artemisia, Pinus). Our findings link the NE trade wind development with the intensification of the Northern Hemisphere glaciations (iNHG). Prior to the iNHG, little or no systematic relation could be found between sea surface temperatures of the North Atlantic with aridity and dust in West Africa.
    Schlagwort(e): Ocean Drilling Program; ODP
    Materialart: Dataset
    Format: application/zip, 2 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unbekannt
    Miocene-Pliocene record of Pollen, charcoal and carbon isotopes of plant waxes of ODP Hole 175-1081A (2013)
    PANGAEA
    In:  Supplement to: Hötzel, Sebastian; Dupont, Lydie M; Schefuß, Enno; Rommerskirchen, Florian; Wefer, Gerold (2013): The role of fire in Miocene to Pliocene C4 grassland and ecosystem evolution. Nature Geoscience, 6, 1027-1030, https://doi.org/10.1038/ngeo1984
    Details
    Publikationsdatum: 2024-01-09
    Beschreibung: Modern savannah grasslands were established during the late Miocene and Pliocene (8-3 million years ago). In the tropics, grasslands are dominated by grasses that use the C4 photosynthetic pathway, rather than the C3 pathway. The C4 pathway is better adapted to warm, dry and low-CO2 conditions, leading to suggestions that declining atmospheric CO2 levels, increasing aridity and enhanced rainfall seasonality allowed grasses using this pathway to expand during this interval. The role of fire in C4 expansion may have been underestimated. Here we use analyses of pollen, microscopic charcoal and the stable isotopic composition of plant waxes from a marine sediment core off the coast of Namibia to reconstruct the relative timing of changes in plant composition and fire activity for the late Miocene and Pliocene. We find that in southwestern Africa, the expansion of C4 grasses occurred alongside increasing aridity and enhanced fire activity. During further aridification in the Pliocene, the proportion of C4 grasses in the grasslands increased, while the grassland contracted and deserts and semi-deserts expanded. Our results are consistent with the hypothesis that ecological disturbance by fire was an essential feedback mechanism leading to the establishment of C4 grasslands in the Miocene and Pliocene.
    Schlagwort(e): Ocean Drilling Program; ODP
    Materialart: Dataset
    Format: application/zip, 2 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
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