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  • 1
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    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
    Publication Date: 2024-01-09
    Description: 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.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 2
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    High resolution XRF scanning measurements of ODP Hole 159-959A (2016)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959A; AGE; Aluminium, area, total counts; Calcium, area, total counts; Depth, composite; Depth, composite revised; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gulf of Guinea; Iron, area, total counts; Joides Resolution; Leg159; Ocean Drilling Program; ODP; Potassium, area, total counts; Sample code/label; Silicon, area, total counts; Titanium, area, total counts; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 52334 data points
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    DATA PANGAEA
  • 3
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    High resolution XRF scanning measurements of ODP Hole 159-959B (2016)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959B; AGE; Aluminium, area, total counts; Calcium, area, total counts; Depth, composite; Depth, composite revised; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gulf of Guinea; Iron, area, total counts; Joides Resolution; Leg159; Ocean Drilling Program; ODP; Potassium, area, total counts; Sample code/label; Silicon, area, total counts; Titanium, area, total counts; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 60111 data points
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    DATA PANGAEA
  • 4
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    High resolution XRF scanning measurements from the spliced core of ODP Site 159-959 (2016)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959; AGE; Aluminium, area, total counts; Calcium, area, total counts; COMPCORE; Composite Core; Depth, composite; Depth, composite revised; DEPTH, sediment/rock; Gulf of Guinea; Iron, area, total counts; Joides Resolution; Leg159; Ocean Drilling Program; ODP; Potassium, area, total counts; Sample code/label; Silicon, area, total counts; Titanium, area, total counts; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 72477 data points
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  • 5
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    XRF scanning for Plio-Pleistocene periods of ODP Site 108-659 (2014)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 108-659; AGE; Aluminium, area, total counts; Calcium, area, total counts; COMPCORE; Composite Core; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Iron, area, total counts; Joides Resolution; Leg108; Ocean Drilling Program; ODP; Potassium, area, total counts; Sample code/label; Silicon, area, total counts; South Atlantic Ocean; Time Stamp; Titanium, area, total counts; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 25478 data points
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    DATA PANGAEA
  • 6
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    High resolution XRF scanning measurements of ODP Hole 159-959C (2016)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 159-959C; AGE; Aluminium, area, total counts; Calcium, area, total counts; Depth, composite; Depth, composite revised; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Gulf of Guinea; Iron, area, total counts; Joides Resolution; Leg159; Ocean Drilling Program; ODP; Potassium, area, total counts; Sample code/label; Silicon, area, total counts; Titanium, area, total counts; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 57978 data points
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    DATA PANGAEA
  • 7
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    Pollen and spores of ODP Site 108-659 (2014)
    PANGAEA
    Details
    Publication Date: 2024-03-06
    Keywords: 108-659; Acacia; Acalypha; Acanthaceae; Afzelia; AGE; Aizoaceae; Alchornea; Alnus; Anthocerotaceae undifferentiated; Antidesma-type; Apiaceae; Apocynaceae; Arecaceae; Artemisia; Asteraceae Liguliflorae; Asteraceae Tubuliflorae; Balanites; Baphia-type; Betula; Bignoniaceae; Blepharis; Boraginaceae; Borreria; Boscia; Bosqueia; Boswellia; Brassica-type; Bryonia; Cadaba; Calculated; Calligonum; Capparidaceae; Carpinus; Caryophyllaceae, Chenopodiaceae, Amaranthaceae; Cassia-type; Cedrus; Celtis; Cistaceae; Cleome; Cocculus; Coffea-type; Cola nitida-type; Combretaceae; Commicarpus; Commiphora; COMPCORE; Composite Core; Convolvulaceae; Corchorus; Corylus; Counting, palynology; Crassulaceae; Cyperaceae; Depth, composite; DEPTH, sediment/rock; Dichrostachys cinerea; Diospyros; Dobera-type; Dodonaea viscosa; DSDP/ODP/IODP sample designation; Ephedra; Ericaceae; Euphorbia; Euphorbiaceae indeterminata; Fagonia; Fagus; Fern spores; Fern spores, trilete; Filipendula; Fraxinus; Geraniaceae; Grewia; Gymnosporia; Hedera; Helianthemum; Heliotropium-type; Hippocrateaceae; Hymenocardia; Hyphaene; Hypoestes type; Icacinaceae undifferentiated; Ilex; Indigofera-type; Intercore correlation; Isoberlinia-type; Isoetes; Jasminum; Jatropha; Joides Resolution; Juglans; Juniperus; Justicia-type; Lamiaceae; Lannea; Leg108; Leguminosae; Liliaceae; Maerua; Mallotus; Malvaceae; Manilkara; Marker, added; Marker, found; Martretia; Monolete psilate; Monolete spore sculptured; Myrica; Myriophyllum; Myrtaceae; Neurada; Nitraria; Nyctaginaceae; Ocean Drilling Program; Ochnaceae; ODP; Olax; Olea; Oleaceae indeterminata; Ophioglossum; Ostrya; Parinari; Phillyrea; Phoenix; Phyllanthus; Picea; Pinaceae; Plantago; Platanus; Plumbaginaceae undifferentiated; Poaceae; Podocarpus; Pollen, total; Polypodium; Principal investigator; Pteris; Pterocarpus; Pterocarya; Quercus; Ranunculaceae; Rhizophora; Rhus; Rosaceae; Rubiaceae; Rubiaceae-type; Rumex; Sample code/label; Sapium-type; Sapotaceae/Meliaceae; Securinega; Sedimentation rate; Solanum; South Atlantic Ocean; Sterculia-type; Symplocaceae; Tamarix; Thymelaeaceae; Tilia; Tribulus; Trilete psilate; Tsuga; Typha; Typha latifolia; Uapaca; Ulmus; Urtica; Varia; Vernonia-type; Volume; Ziziphus
    Type: Dataset
    Format: text/tab-separated-values, 21836 data points
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  • 8
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    XRF scanning, revisited composite depth and age model of ODP Site 159-959 (1.8-6.2 Ma) (2016)
    PANGAEA
    In:  Supplement to: Vallé, Francesca; Westerhold, Thomas; Dupont, Lydie M (2016): Orbital-driven environmental changes recorded at ODP Site 959 (eastern equatorial Atlantic) from the Late Miocene to the Early Pleistocene. International Journal of Earth Sciences, https://doi.org/10.1007/s00531-016-1350-z
    Details
    Publication Date: 2024-01-09
    Description: In this study, new high-resolution XRF data from ODP Site 959 (3°37'N, 2°44'W) have been used to investigate the relationship between paleoenvironmental changes in West Africa and sedimentation in the tropical east Atlantic Ocean. Fe intensity data have been used to build a 91 meter composite depth record that has been astronomically tuned allowing the development of a detailed age model from 6.2 to 1.8 Ma. Based on this new stratigraphy we studied the variations of Ti/Al, Ti/Ca and Al/Si ratios, proxies for aeolian vs. fluvial supply, as dust indicator and fine vs. coarse grain size, respectively. We discuss sedimentation patterns at ODP Site 959 associated to the environmental changes from the late Miocene until the early Pleistocene. During the interval corresponding to the earlier stages of the Messinian Salinity Crisis our proxy records indicate enhanced run-off from the West African continent and major supply of fine material at ODP Site 959, suggesting a stronger monsoon and increased precipitation during eccentricity minima. A long-term decrease of river supply is documented after 5.4 Ma towards the early Pleistocene. From the increased values and variability of Ti/Al ratios we suggest that after 3.8 Ma dust started to reach the study site probably as a result of the southward shift of the Intertropical Convergence Zone during winter. Between 3.2 and 2.9 Ma ODP Site 959 Ti/Ca ratios exhibit three maxima corresponding to eccentricity maxima similarly to other dust records of northern Africa. This suggests continent-wide aridity or larger climate variability during that interval. Eccentricity forcing (405 kyr and 100 kyr) and precession frequencies are found in the entire studied interval. The variations of Ti/Al ratio suggest stronger seasonality between 5.8 and 5.5 Ma and after 3.2 Ma.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 9
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    Pollen-based climate reconstruction techniques for late Quaternary studies (2020)
    Elsevier
    Details
    Publication Date: 2020-11-01
    Print ISSN: 0012-8252
    Electronic ISSN: 1872-6828
    Topics: Geography , Geosciences
    Published by Elsevier
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  • 10
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    Holocene vegetation history and quantitative climate reconstructions in a high-elevation oceanic district of the Italian Alps. Evidence for a middle to late Holocene precipitation increase (2018)
    Elsevier
    Details
    Publication Date: 2018-11-01
    Print ISSN: 0277-3791
    Electronic ISSN: 1873-457X
    Topics: Geography , Geosciences
    Published by Elsevier
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    PAPER CURRENT
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