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  • AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI  (2)
  • 70-506; 70-506B; 70-506C; 70-507D; 70-507F; 70-509B; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Latitude of event; Lead-206/Lead-204 ratio; Lead-207/Lead-204 ratio; Lead-208/Lead-204 ratio; Leg70; Lithology/composition/facies; Longitude of event; North Pacific/MOUND; Sample code/label; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error  (1)
  • 70-507D; 70-509B; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Calculated; Comment; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Event label; Glomar Challenger; Grain size, SEDIGRAPH 5100; Iron oxide, Fe2O3; Iron oxide, Fe2O3, standard deviation; Leg70; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; North Pacific/MOUND; Potassium oxide; Potassium oxide, standard deviation; Sample code/label; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Sum  (1)
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Keywords
Publisher
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  • 1
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    Unknown
    Palaeoceanographic data of sediment core MD01-2416
    PANGAEA
    In:  Supplement to: Maier, Edith; Chapligin, Bernhard; Abelmann, Andrea; Gersonde, Rainer; Esper, Oliver; Ren, Jian; Friedrichsen, Hans; Meyer, Hanno; Tiedemann, Ralf (2013): Combined oxygen and silicon isotope analysis of diatom silica from a deglacial subarctic Pacific record. Journal of Quaternary Science, 28(6), 571-581, https://doi.org/10.1002/jqs.2649
    Details
    Publication Date: 2023-05-12
    Description: We present an SiF4 separation line, coupled to a laser fluorination system, which allows for an efficient combined silica d18O and d30Si analysis (50 min per sample). The required sample weight of 1.5-2.0 mg allows for high-resolution isotope studies on biogenic opal. Besides analytical tests, the new instrumentation set-up was used to analyse two marine diatom fractions (〉63 µm, 10-20 µm) with different diatom species compositions extracted from a Bølling/Allerød-Holocene core section [MD01-2416, North-West (NW) Pacific] to evaluate the palaeoceanographic significance of the diatom isotopic signals and to address isotopic effects related to contamination and species-related isotope effects (vital and environmental effects). While d30Si offsets between the two fractions were not discernible, supporting the absence of species-related silicon isotope effects, systematic offsets occur between the d18O records. Although small, these offsets point to species-related isotope effects, as bias by contamination can be discarded. The new records strengthen the palaeoceanographic history during the last deglaciation in the NW Pacific characterized by a sequence of events with varying surface water structure and biological productivity. With such palaeoceanographic evolution it becomes unlikely that the observed systematic d18O offsets signal seasonal temperature variability. This calls for reconsideration of vital effects, generally excluded to affect d18O measurements.
    Keywords: AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    The seasonal sea-ice zone in the glacial Southern Ocean as a carbon sink, supplementary datasets (2015)
    PANGAEA
    In:  Supplement to: Abelmann, Andrea; Gersonde, Rainer; Knorr, Gregor; Zhang, Xu; Chapligin, Bernhard; Maier, Edith; Esper, Oliver; Friedrichsen, Hans; Lohmann, Gerrit; Meyer, Hanno; Tiedemann, Ralf (2015): The seasonal sea-ice zone in the glacial Southern Ocean as a carbon sink. Nature Communications, 6, 8136, https://doi.org/10.1038/ncomms9136
    Details
    Publication Date: 2023-03-30
    Description: Reduced surface-deep ocean exchange and enhanced nutrient consumption by phytoplankton in the Southern Ocean have been linked to lower glacial atmospheric CO2. However, identification of the biological and physical conditions involved and the related processes remains incomplete. Here we specify Southern Ocean surface-subsurface contrasts using a new tool, the combined oxygen and silicon isotope measurement of diatom and radiolarian opal, in combination with numerical simulations. Our data do not indicate a permanent glacial halocline related to melt water from icebergs. Corroborated by numerical simulations, we find that glacial surface stratification was variable and linked to seasonal sea-ice changes. During glacial spring-summer, the mixed layer was relatively shallow, while deeper mixing occurred during fall-winter, allowing for surface-ocean refueling with nutrients from the deep reservoir, which was potentially richer in nutrients than today. This generated specific carbon and opal export regimes turning the glacial seasonal sea-ice zone into a carbon sink.
    Keywords: AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 12 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Unknown
    (Table 2, part b) Electron microprobe analyses of individual nontronite granules (6-10 mm diameter) from DSDP Holes 507D and 509B (1982)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: 70-507D; 70-509B; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Calculated; Comment; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Event label; Glomar Challenger; Grain size, SEDIGRAPH 5100; Iron oxide, Fe2O3; Iron oxide, Fe2O3, standard deviation; Leg70; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; North Pacific/MOUND; Potassium oxide; Potassium oxide, standard deviation; Sample code/label; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Sum
    Type: Dataset
    Format: text/tab-separated-values, 55 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    (Table 3) Pb- and Sr-isotopic compositions of selected samples of nontronite, Mn-oxide crust, Mn-Fe-oxide mud, and pelagic sediments from the Galapagos mounds area, Leg 70 (1982)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: 70-506; 70-506B; 70-506C; 70-507D; 70-507F; 70-509B; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Latitude of event; Lead-206/Lead-204 ratio; Lead-207/Lead-204 ratio; Lead-208/Lead-204 ratio; Leg70; Lithology/composition/facies; Longitude of event; North Pacific/MOUND; Sample code/label; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error
    Type: Dataset
    Format: text/tab-separated-values, 120 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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