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  • 1990-1994  (14)
Document type
Keywords
Publisher
Language
Years
Year
  • 1
    Book
    Book
    Southern Ocean process study science plan (1993)
    Details Availability
    Type of Medium: Book
    Pages: III, 67 S
    Series Statement: U.S. JGOFS planning report 17
    Language: English
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    GEOMAR CATALOGUE
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  • 2
    Book
    Book
    U. S. JGOFS Southern Ocean process study : planning workshop report, 2-4 October 1990 (1992)
    Details Availability
    Type of Medium: Book
    Series Statement: U.S. JGOFS planning report 16
    Language: English
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  • 3
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    Thorium and radiocarbon measurements on sediment cores from the Northseast Atlantic (1993)
    PANGAEA
    In:  Supplement to: Thomson, John; Colley, S; Anderson, Robert F; Cook, G T; MacKenzie, Angus; Harkness, Douglas D (1993): Holocene sediment fluxes in the northeast Atlantic from 230Th excess and radiocarbon measurements. Paleoceanography, 8(5), 631-650, https://doi.org/10.1029/93PA01366
    Details
    Publication Date: 2024-02-01
    Description: Radiocarbon and 230Thexcess data from six NE Atlantic box cores are considered. The cores form a transect from the Porcupine Abyssal Plain over the East Thulean Rise to the southern end of Feni Drift. The chronology for the cores is established from bulk sediment carbonate radiocarbon data and reveals that sections exhibiting constant accumulation rates can be identified in all the cores, with rates of 3.0-3.5 cm/kyr on the plain through the Holocene and late Holocene rates of 4.3-6.6 cm/kyr elsewhere. Five out of the six cores show accumulations of more 230Thexcess than is produced in the overlying water column, with the greatest inventories (up to 225% of production) in the cores from the rise and drift. A size fraction comparison between two cores from the plain and rise reveals that the higher overall accumulation rates and 230Thexcess inventories in the off-plain cores are due to an increased fine (〈5 µm) component fraction, whereas the flux of coarser material is similar to that received on the plain. This suggests that the higher fluxes of materials observed are physically (rather than biogeochemically) driven and also that drift formation has been continuously active in the late Holocene. Sections of all the cores where regular accumulation is defined by the radiocarbon data are modeled first by a linear radiocarbon age/depth model and second by a constant rain (230Thexcess)0 model prorated for the observed core inventories. These modeling approaches yield historical mass accumulation rate estimates which are generally in reasonable agreement (±30%), but the differences observed appear to be well organized in time rather than random.
    Keywords: BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11880#5; BOFS11881#4; BOFS11882#3; BOFS11884#2; BOFS11886#4; BOFS11889#4; BOFS3C; BOFS4C; BOFS5C; BOFS7C; BOFS8C; BOFS9C; Box corer; D184; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic
    Type: Dataset
    Format: application/zip, 7 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    (Table 2) Age determination and sedimentation rates from surface sediments (1993)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Age, 14C conventional; Age, dated; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11880#5; BOFS11881#4; BOFS11882#3; BOFS11884#2; BOFS11886#4; BOFS11889#4; BOFS3C; BOFS4C; BOFS5C; BOFS7C; BOFS8C; BOFS9C; Box corer; Calculated; D184; DEPTH, sediment/rock; Discovery (1962); Elevation of event; Event label; JGOFS; Joint Global Ocean Flux Study; Latitude of event; Longitude of event; Mixing depth; Northeast Atlantic; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 23 data points
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    DATA PANGAEA
  • 5
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    (Table 1) Geochemistry of sediment core BOFS9C (1993)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: AGE; Age, standard deviation; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11889#4; BOFS9C; Box corer; Calcium carbonate; Calculated from mass/volume; Coulometrics Carbon Analyzer; D184; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic; Thorium; Thorium, standard deviation; Thorium/Uranium ratio; Thorium/Uranium ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Uranium; Uranium, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 231 data points
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  • 6
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    (Table 1) Geochemistry of sediment core BOFS4C (1993)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: AGE; Age, standard deviation; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11881#4; BOFS4C; Box corer; Calcium carbonate; Calculated from mass/volume; Coulometrics Carbon Analyzer; D184; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic; Thorium; Thorium, standard deviation; Thorium/Uranium ratio; Thorium/Uranium ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Uranium; Uranium, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 210 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table 1) Geochemistry of sediment core BOFS3C (1993)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: AGE; Age, standard deviation; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11880#5; BOFS3C; Box corer; Calcium carbonate; Calculated from mass/volume; Coulometrics Carbon Analyzer; D184; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic; Thorium; Thorium, standard deviation; Thorium/Uranium ratio; Thorium/Uranium ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Uranium; Uranium, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 210 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Table 1) Geochemistry of sediment core BOFS7C (1993)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: AGE; Age, standard deviation; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11884#2; BOFS7C; Box corer; Calcium carbonate; Calculated from mass/volume; Coulometrics Carbon Analyzer; D184; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic; Thorium; Thorium, standard deviation; Thorium/Uranium ratio; Thorium/Uranium ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Uranium; Uranium, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 168 data points
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    DATA PANGAEA
  • 9
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    (Table 1) Geochemistry of sediment core BOFS5C (1993)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: AGE; Age, standard deviation; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11882#3; BOFS5C; Box corer; Calcium carbonate; Calculated from mass/volume; Coulometrics Carbon Analyzer; D184; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic; Thorium; Thorium, standard deviation; Thorium/Uranium ratio; Thorium/Uranium ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Uranium; Uranium, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 126 data points
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  • 10
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    (Table 1) Geochemistry of sediment core BOFS8C (1993)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: AGE; Age, standard deviation; BC; Biogeochemical Ocean Flux Study; BOFS; BOFS11886#4; BOFS8C; Box corer; Calcium carbonate; Calculated from mass/volume; Coulometrics Carbon Analyzer; D184; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Discovery (1962); JGOFS; Joint Global Ocean Flux Study; Northeast Atlantic; Thorium; Thorium, standard deviation; Thorium/Uranium ratio; Thorium/Uranium ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230/Thorium-232 activity ratio; Thorium-230/Thorium-232 activity ratio, standard deviation; Thorium-230 excess; Thorium-230 excess, standard deviation; Uranium; Uranium, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 210 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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