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    Radiocarbon – A Unique Tracer of Global Carbon Cycle Dynamics

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    Author
    Levin, Ingeborg
    Hesshaimer, Vago
    Issue Date
    2000-01-01
    Keywords
    global warming
    greenhouse effect
    world ocean
    gases
    climate
    cycles
    tracers
    carbon cycle
    geochemical cycle
    global change
    organic carbon
    human activity
    atmosphere
    tree rings
    C 14
    carbon
    isotopes
    radioactive isotopes
    carbon dioxide
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    Metadata
    Show full item record
    Citation
    Levin, I., & Hesshaimer, V. (2000). Radiocarbon – a unique tracer of global carbon cycle dynamics. Radiocarbon, 42(1), 69-80.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/654565
    DOI
    10.1017/S0033822200053066
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200053066
    Scopus Count
    Collections
    Radiocarbon, Volume 42, Number 1 (2000)

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      Preparation of Inorganic and Organic Carbon for 14 C Analysis from a Single Marine Sample

      Griffin, Sheila; Druffel, Ellen R. M. (Department of Geosciences, The University of Arizona, 1998-01-01)
      We have developed a technique using a single apparatus to recover the inorganic and organic carbon from a small (few milligrams) aliquot of dried marine material for radiocarbon analysis. The main advantages of using a single apparatus are: 1) less sample is required, 2) decreased handling reduces contamination, and 3) less time and materials are used. Blank values of approximately 5 micrograms and 19-44 micrograms are obtained for the inorganic and organic carbon extractions, respectively. Delta-14C results from sinking particulate organic and inorganic carbon are presented for samples collected in deep-sea sediment traps deployed for 10-30 day periods at 650 and 100 m above bottom (mab) in the northeast Pacific Ocean.
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      A Method for Quantifying Deep-Sea Carbonate Dissolution Using 14C Dating

      van Kreveld, S. A.; Ganssen, G. M.; van der Plicht, J. E.; Melkert, M. M.; Troelstra, S. R.; van der Borg, K.; de Jong, Arie (Department of Geosciences, The University of Arizona, 1995-01-01)
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      Carbon Isotope Analysis of Land Snail Shells: Implications for Carbon Sources and Radiocarbon Dating

      Goodfriend, Glenn A.; Hood, Darden G. (American Journal of Science, 1983-01-01)
      13C and 14C analyses were performed on a series of modern Jamaican land snails in order to quantitatively determine the sources of shell carbon. A model of these carbon sources, the pathways by which carbon reaches the shell, and the fractionation processes involved are presented. The contribution of limestone to shell carbonate is variable but may comprise up to 33% of the shell. About 25-40% of shell carbonate is derived from plants and about 30-60% from atmospheric CO2. Variation among populations and species with respect to 13C and 14C is attributed to the effects of limestone incorporation, snail size (as it affects CO2 exchange rate), physiological characteristics (presence of urease, respiration rate), and activity patterns of the snails. A formula for correction for isotopic fractionation of 14C of shell carbonate, based on "C measurements, is derived. Bicarbonate-aragonite fractionation is apparently very minimal. Shell organic carbon appears to be derived largely from plants but also to a lesser extent from inorganic hemolymph carbon. This introduces the possibility of a small age anomaly of shell organic 14C due to limestone incorporation.
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