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  • 1
    Buch
    Buch
    Paleogene Paleoceanography Workshop report : January 4 - 6, 1991, Lake Arrowhead, CA (1991)
    [S.l.] : JOI-USSAC
    Details Verfügbarkeit
    Schlagwort(e): Kongreß Konferenz
    Materialart: Buch
    Seiten: 41 Bl , graph. Darst
    Sprache: Englisch
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Increased dissolved oxygen in Pacific intermediate waters due to lower rates of carbon oxidation in sediments (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 407 (2000), S. 367-370 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Concentrations of dissolved oxygen in the ocean seem to correlate well with climate instabilities over the past 100,000 years. For example, the concentration of dissolved oxygen in Pacific intermediate waters was considerably higher during Pleistocene glacial periods than it ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/35030084
    Standort Signatur Einschränkungen Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    New constraints on early Tertiary palaeoproductivity from carbon isotopes in foraminifera (1989)
    [s.l.] : Nature Publishing Group
    Nature 342 (1989), S. 526-529 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Leg 113 of the Ocean Drilling Program (OOP) drilled at two sites at 65á° S on Maud Rise, Antarctica. Together, the two sequences provided a nearly continuous record of biogenic sedimentation through the Cenozoic and late Mesozoic14. Hole 690C, on the flank of Maud Rise, contains a ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/342526a0
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  • 4
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    The atmospheric bridge communicated the δ13C decline during the last deglaciation to the global upper ocean (2021)
    Copernicus Publications (EGU)
    Details
    Publikationsdatum: 2024-02-07
    Beschreibung: During the early part of the last glacial termination (17.2-15 ka) and coincident with a ∼ 35 ppm rise in atmospheric CO2, a sharp 0.3‰-0.4‰ decline in atmospheric δ13CO2 occurred, potentially constraining the key processes that account for the early deglacial CO2 rise. A comparable δ13C decline has also been documented in numerous marine proxy records from surface and thermocline-dwelling planktic foraminifera. The δ13C decline recorded in planktic foraminifera has previously been attributed to the release of respired carbon from the deep ocean that was subsequently transported within the upper ocean to sites where the signal was recorded (and then ultimately transferred to the atmosphere). Benthic δ13C records from the global upper ocean, including a new record presented here from the tropical Pacific, also document this distinct early deglacial δ13C decline. Here we present modeling evidence to show that rather than respired carbon from the deep ocean propagating directly to the upper ocean prior to reaching the atmosphere, the carbon would have first upwelled to the surface in the Southern Ocean where it would have entered the atmosphere. In this way the transmission of isotopically light carbon to the global upper ocean was analogous to the ongoing ocean invasion of fossil fuel CO2. The model results suggest that thermocline waters throughout the ocean and 500-2000m water depths were affected by this atmospheric bridge during the early deglaciation.
    Materialart: Article , PeerReviewed
    Format: text
    Format: text
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  • 5
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    Carbon isotopes record in the Southeast Pacific (2019)
    PANGAEA
    In:  Supplement to: Martínez Fontaine, Consuelo; De Pol-Holz, Ricardo; Michel, Elisabeth; Siani, Giuseppe; Reyes-Macaya, Dharma; Martínez Méndez, Gema; DeVries, Tim; Stott, Lowell D; Southon, John; Mohtadi, Mahyar; Hebbeln, Dierk (2019): Ventilation of the deep ocean carbon reservoir during the last deglaciation: results from the southeast pacific. Paleoceanography and Paleoclimatology, 34(12), 2080-2097, https://doi.org/10.1029/2019PA003613
    Details
    Publikationsdatum: 2023-03-03
    Beschreibung: Supplementary material for Martínez Fontaine et al., 2019 (Table S1), including the radiocarbon ages in benthonic and planktonic foraminifera in six cores in the Chilean margin, beetween ~31°S and ~36°S (Table S3). The age models for the cores are detailed in Martínez Fontaine et al., 2019 and were produced using the information on planktonic δ13C (Table S2). Also included are the Δ14C resulting from the age models.
    Schlagwort(e): Center for Marine Environmental Sciences; Deglaciation; MARUM; radiocarbon; Southeast Pacific
    Materialart: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 6
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    Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean (2015)
    PANGAEA
    In:  Supplement to: Broecker, Wallace S; Clark, Elizabeth; Lynch-Stieglitz, Jean; Beck, Warren; Stott, Lowell D; Hajdas, Irena; Bonani, Georges (2000): Late glacial diatom accumulation at 9°S in the Indian Ocean. Paleoceanography, 15(3), 348-352, https://doi.org/10.1029/1999PA000439
    Details
    Publikationsdatum: 2023-05-12
    Beschreibung: A continuous 10-m-long section consisting of roughly two thirds Ethmodiscus rex (a diatom) and one third mixed planktonic foraminifera was identified in a core from 3800 m depth at 9°S on the Indian Ocean's 90°E Ridge. Radiocarbon dates place the onset of deposition of this layer at 〉30,000 years B.P. and its termination at close to 11,000 years B.P. However, precise dating of the foraminifera from the Ethmodiscus layer itself proved to be impossible owing to the presence of secondary calcite presumably precipitated from the pore waters. During the Holocene, high calcium carbonate content ooze free of diatoms was deposited at this locale. As the site currently lies beneath the pathway taken by upper ocean waters entering the Indian Ocean from the Pacific (via the Indonesian Straits), it appears that during glacial time, thermocline waters moving along this same path provided the silica and other nutrients required by these diatoms.
    Materialart: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 7
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    Late Pleistocene stable isotope record of the Northeastern Pacific Margin
    PANGAEA
    In:  Supplement to: Stott, Lowell D; Neumann, M; Hammond, Douglas E (2000): Intermediate water ventilation on the Northeastern Pacific Margin during the Late Pleistocene inferred from benthic foraminiferal d13C. Paleoceanography, 15(2), 161-169, https://doi.org/10.1029/1999PA000375
    Details
    Publikationsdatum: 2023-05-12
    Beschreibung: Late Pleistocene intermediate water ventilation history in the northeastern Pacific has been inferred from benthic foraminiferal carbon isotopic data from seven California margin basins. Secular variations in oceanic d13C recorded at North Pacific ODP Site 849 were subtracted from each basin record leaving a residual d13C history that reflects variations in ventilation. During the previous interglacial intermediate waters above 2000m contained less oxygen than they do today or Pacific deep water at Site 849 was better ventilated. Intermediate water ventilation began to improve during oxygen isotope stage 4 and continued to improve throughout stages 3 and 2. This enhanced ventilation was not contemporaneous at all depths and appears to have progressed upwards through the water column. The diachronous nature of these changes suggest that there was not simply an "on"/"off" mechanism which resulted in higher or lower ventilation in the North Pacific during the last glacial cycle.
    Materialart: Dataset
    Format: application/zip, 8 datasets
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    DATA PANGAEA
  • 8
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    (Table 2) Age determination of sediment cores from the Californian Margin
    PANGAEA
    Details
    Publikationsdatum: 2023-05-12
    Schlagwort(e): Age, 14C AMS; Age, dated; Age, dated standard deviation; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; EW9504-02PC; EW9504-03PC; EW9504-04PC; EW9504-05PC; EW9504-08PC; EW9504-09PC; Laboratory code/label; Latitude of event; Longitude of event; Northeast Pacific; PC; Piston corer
    Materialart: Dataset
    Format: text/tab-separated-values, 140 data points
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    DATA PANGAEA
  • 9
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    Foraminiferal stable isotope ratios of sediment core EW9504-02PC
    PANGAEA
    Details
    Publikationsdatum: 2023-05-12
    Schlagwort(e): AGE; Cibicides mckannai, δ13C; Cibicides mckannai, δ18O; DEPTH, sediment/rock; EW9504-02PC; Globigerina bulloides, δ18O; Mass spectrometer VG Prism Series II; Northeast Pacific; PC; Piston corer
    Materialart: Dataset
    Format: text/tab-separated-values, 211 data points
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    DATA PANGAEA
  • 10
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    Foraminiferal stable isotope ratios of sediment core EW9504-03PC
    PANGAEA
    Details
    Publikationsdatum: 2023-05-12
    Schlagwort(e): AGE; Cibicides mckannai, δ13C; Cibicides mckannai, δ18O; DEPTH, sediment/rock; EW9504-03PC; Globigerina bulloides, δ18O; Mass spectrometer VG Prism Series II; PC; Piston corer
    Materialart: Dataset
    Format: text/tab-separated-values, 126 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
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