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  • 2020-2023  (1)
  • 2000-2004  (11)
Publikationsart
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Sprache
Erscheinungszeitraum
Jahr
  • 1
    ISSN: 1365-3121
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie
    Notizen: The carbon-isotope signature of terrestrial organic matter (OM) offers a valuable tool to develop stratigraphic correlations for near-shore deposits. A mid-Cretaceous coastal succession of the western Algarve Basin, Portugal, displays a marked negative δ13C excursion ranging from − 21.2‰ to − 27.8‰ in the Early Aptian followed by two shifts towards higher values (up to − 19.3‰) during the Early and Late Aptian, respectively. The dominance of cuticle and leaf debris in the bulk OM fraction is confirmed by optical studies, Rock-Eval pyrolysis and by comparison with the δ13C signature of four different types of fossilized land-plant particles. Correlation of two terrestrial δ13Cbulk OM records from different study sites leads to a significant enhancement of the intrabasinal stratigraphic correlation within the Algarve Basin. Three prominent excursions in the Portuguese records can be correlated with existing δ13C curves from pelagic and terrestrial environments. The general carbon-isotope pattern is superimposed by small-scale fluctuations which can be explained by compositional variations within the OM.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Publikationsdatum: 2022-03-24
    Beschreibung: We collected a suite of core top samples during R/V Sonne Cruise SO257 in May 2017 along the southwestern front of the Indo‐Pacific Warm Pool (IPWP) to monitor the variability of Southern Hemisphere tropical and subtropical sea surface hydrology and to assess temperature and salinity reconstructions with data sets reflecting conditions in the post‐monsoonal season. In our core top samples, a steep increase in planktic δ18O, associated with a decrease in sea surface temperature (SST), indicates that the southwestern front of the IPWP is located between 23° and 24°S during austral fall. We additionally reconstructed SST, sea surface salinity ,and δ18O seawater (δ18Osw) over the last 450 kyr in two sediment successions located within and beyond the monsoonal rain belt. Our records show that SST was highly coherent and phase‐locked with atmospheric pCO2 during the last 450 kyr. The regional differences in the δ18Osw records reveal that the Western Australian Margin north of 15°S remained seasonally under the influence of IPWP water masses, even during glacials. The temporal variability in upper ocean hydrology along the Western Australian Margin is not directly coupled to local monsoonal precipitation, but is strongly affected by advective mixing of Indonesian Throughflow derived water masses.
    Beschreibung: Key Points: Southwest front of modern Indo‐Pacific Warm Pool (IPWP) during austral fall is located between 23° and 24°S. Western Australian Margin north of 15°S remained seasonally influenced by IPWP throughout past 450 kyr. Upper ocean hydrology off Western Australia represents an integrated signal of monsoonal precipitation and advective mixing.
    Beschreibung: China Scholarship Council
    Beschreibung: German Federal Ministry of Education and Research
    Schlagwort(e): ddc:551.46
    Sprache: Englisch
    Materialart: doc-type:article
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
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    PANGAEA
    Publikationsdatum: 2023-02-24
    Schlagwort(e): ANT-VII/5; Calculated; Calculated from UK'37 (Prahl et al., 1988); DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; Polarstern; PS14; Sample code/label; Sea surface temperature, annual mean; Trap; TRAP; Walvis Ridge, Southeast Atlantic Ocean; WR2_trap
    Materialart: Dataset
    Format: text/tab-separated-values, 78 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
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    PANGAEA
    Publikationsdatum: 2023-11-30
    Schlagwort(e): 24-Ethylcholest-5-en-3beta-ol, flux; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, flux; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,24(28)-dien-3beta-ol, flux; 24-Methylcholesta-5,24(28)-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, flux; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; Alkenone, C37, flux; Alkenone, C37 normalized to total organic carbon; Calculated; Calculated, see reference(s); CB2_trap; Cholesta-5-en-3beta-ol, flux; Cholesta-5-en-3beta-ol, per unit mass total organic carbon; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; M9/4; Meteor (1986); Sample code/label; Trap; TRAP
    Materialart: Dataset
    Format: text/tab-separated-values, 339 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
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    Unbekannt
    PANGAEA
    Publikationsdatum: 2023-11-30
    Schlagwort(e): 24-Ethylcholest-5-en-3beta-ol, flux; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, flux; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,24(28)-dien-3beta-ol, flux; 24-Methylcholesta-5,24(28)-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, flux; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; Alkenone, C37, flux; Alkenone, C37 normalized to total organic carbon; Calculated; Calculated, see reference(s); Cholesta-5-en-3beta-ol, flux; Cholesta-5-en-3beta-ol, per unit mass total organic carbon; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GBN3_trap; GeoB; Geosciences, University of Bremen; M9/4; Meteor (1986); Sample code/label; Trap; TRAP
    Materialart: Dataset
    Format: text/tab-separated-values, 311 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
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    Unbekannt
    PANGAEA
    Publikationsdatum: 2023-11-30
    Schlagwort(e): 24-Ethylcholest-5-en-3beta-ol, flux; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, flux; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,24(28)-dien-3beta-ol, flux; 24-Methylcholesta-5,24(28)-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, flux; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; Alkenone, C37, flux; Alkenone, C37 normalized to total organic carbon; Calculated; Calculated, see reference(s); Cholesta-5-en-3beta-ol, flux; Cholesta-5-en-3beta-ol, per unit mass total organic carbon; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; GeoB; Geosciences, University of Bremen; M12/1; Meteor (1986); Sample code/label; Trap; TRAP; Walvis Ridge, Southeast Atlantic Ocean; WR3_trap
    Materialart: Dataset
    Format: text/tab-separated-values, 243 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
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    Unbekannt
    PANGAEA
    Publikationsdatum: 2023-11-30
    Schlagwort(e): 24-Ethylcholest-5-en-3beta-ol, flux; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, flux; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,24(28)-dien-3beta-ol, flux; 24-Methylcholesta-5,24(28)-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, flux; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; Alkenone, C37, flux; Alkenone, C37 normalized to total organic carbon; ANT-VII/5; Calculated; Calculated, see reference(s); Cholesta-5-en-3beta-ol, flux; Cholesta-5-en-3beta-ol, per unit mass total organic carbon; DATE/TIME; Date/time end; DEPTH, water; Duration, number of days; Gas chromatography - Mass spectrometry (GC-MS); GeoB; Geosciences, University of Bremen; Polarstern; PS14; Sample code/label; Trap; TRAP; Walvis Ridge, Southeast Atlantic Ocean; WR2_trap
    Materialart: Dataset
    Format: text/tab-separated-values, 468 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Publikationsdatum: 2024-02-02
    Schlagwort(e): Alkenone, Ep; Alkenone, δ13C; Amazon Fan; Angola Basin; B_LANDER; Bottom lander; Brazil Basin; Calculated; Calculated from UK'37 (Prahl et al., 1988); Carbon dioxide, dissolved; Carbon dioxide, partial pressure; DEPTH, sediment/rock; Elevation of event; Event label; Gas chromatography; GeoB; GeoB1008-6; GeoB1016-3; GeoB1501-1; GeoB1503-2; GeoB1505-3; GeoB1508-1; GeoB1515-2; GeoB1703-5; GeoB1706-1; GeoB1711-2; GeoB1719-5; GeoB1903-1; GeoB2102-1; GeoB2125-2; GeoB2215-8; Geosciences, University of Bremen; Giant box corer; GIK17843-1; GKG; Gravity corer (Kiel type); Latitude of event; Longitude of event; M16/2; M20/2; M23/2; M23/3; M6/6; Mass spectrometer Finnigan MAT 252; Meteor (1986); Mid Atlantic Ridge; MUC; MultiCorer; Namibia Continental Margin; Namibia continental slope; off Kunene; Phosphate; Photometer, molybdene blue, reduct SnCl; Sea surface temperature, annual mean; SFB261; SL; SO84; Sonne; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; ST. HELENA HOTSPOT; Walvis Ridge; δ15N, gas
    Materialart: Dataset
    Format: text/tab-separated-values, 119 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
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    PANGAEA
    Publikationsdatum: 2024-02-02
    Schlagwort(e): 24-Ethylcholest-5-en-3beta-ol, flux; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, flux; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, flux; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; Alkenone, C37, flux; Alkenone, C37 normalized to total organic carbon; Calculated, see reference(s); Cholesta-5-en-3beta-ol, flux; Cholesta-5-en-3beta-ol, per unit mass total organic carbon; DEPTH, sediment/rock; GeoB; GeoB1405-8; Geosciences, University of Bremen; M16/1; Meteor (1986); MUC; MultiCorer; Northern Guinea Basin
    Materialart: Dataset
    Format: text/tab-separated-values, 108 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    facet.materialart.
    Unbekannt
    PANGAEA
    Publikationsdatum: 2024-02-02
    Schlagwort(e): 24-Ethylcholest-5-en-3beta-ol, flux; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, flux; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, flux; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; Alkenone, C37, flux; Alkenone, C37 normalized to total organic carbon; Calculated, see reference(s); Cholesta-5-en-3beta-ol, flux; Cholesta-5-en-3beta-ol, per unit mass total organic carbon; DEPTH, sediment/rock; GeoB; GeoB1028-2; Geosciences, University of Bremen; M6/6; Meteor (1986); MUC; MultiCorer; Walvis Ridge
    Materialart: Dataset
    Format: text/tab-separated-values, 160 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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