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  • GEOPHYSICS  (2)
  • Comment; Deposit type; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Description; DR830023; DRAKAR; Dredge; DRG; Event label; GS830480; GS830481; GS830506; Identification; Kerguelen Plateau; Marion Dufresne (1972); MD35; MD35-02; MD35-03; MD35-29; MD35-34; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; PC; Piston corer; Position; Quantity of deposit; Sediment type; Size; Substrate type; Visual description  (1)
  • 1985-1989  (2)
  • 1980-1984  (1)
  • 1810-1819
Collection
Keywords
Publisher
Years
  • 1985-1989  (2)
  • 1980-1984  (1)
  • 1810-1819
Year
  • 1
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    Boreal forests and atmosphere - Biosphere exchange of carbon dioxide (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Two approaches to investigating the role of boreal forests in the global carbon cycle are presented. First, a tracer support model which incorporates the normalized-difference vegetation index obtained from advanced, very high resolution radiometer radiances was used to simulate the annual cycle of CO2 in the atmosphere. Results indicate that the seasonal growth of the combined boreal forests of North America and Eurasia accounts for about 50 percent of the mean seasonal CO2 amplitude recorded at Pt. Barrow, Alaska and about 30 percent of the more globally representative CO2 signal at Mauna Loa, Hawaii. Second, tree-ring width data from four boreal treeline sites in northern Canada were positively correlated with Pt. Barrow CO2 drawdown for the period 1971-1982. These results suggest that large-scale changes in the growth of boreal forests may be contributing to the observed increasing trend in CO2 amplitude. They further suggest that tree-ring data may be applicable as indices for CO2 uptake and remote sensing estimates of photosynthetic activity.
    Keywords: GEOPHYSICS
    Type: Nature (ISSN 0028-0836); 329; 321-323
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The plasma wake of the Shuttle Orbiter (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: One of the objectives of the Plasma Diagnostics Package (PDP) instrumentation on Spacelab 2 was to obtain information about the plasma wake of the Shuttle Orbiter. Plasma density and electron temperature data are presented, which were obtained while the PDP was attached to the Shuttle remote manipulator system, and while the PDP was a free-flying satellite. Wake crossings by the PDP from about 40 m to about 240 m behind the Orbiter provide information about the structure of the mid and far wake of the Orbiter. As expected, the wake is characterized by density depressions, relative to the ambient ionospheric plasma, and by enhancements of the electron temperature, particularly in the near and mid wake. The observed electron temperature enhancements appear to be in line with previous spacecraft observations.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 94; 6866-687
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Annotated record of the detailed examination of Mn deposits from DRAKAR cruise stations (1983)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The cores and dredges described at this site were taken on the DRAKAR cruise from 1 March until 1 April 1983 by the Muséum National d'Histoire Naturelle from the R/V Marion Dufresne. A total of 45 cores and dredges were recovered along with underwater camera runs. They are available at MNHN for sampling and study.
    Keywords: Comment; Deposit type; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Description; DR830023; DRAKAR; Dredge; DRG; Event label; GS830480; GS830481; GS830506; Identification; Kerguelen Plateau; Marion Dufresne (1972); MD35; MD35-02; MD35-03; MD35-29; MD35-34; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; PC; Piston corer; Position; Quantity of deposit; Sediment type; Size; Substrate type; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 58 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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