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    High-Accuracy 14C Measurements for Atmospheric CO2 Samples by AMS

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    Author
    Meijer, H. J.
    Pertuisot, M. H.
    van der Plicht, J.
    Issue Date
    2006-01-01
    
    Metadata
    Show full item record
    Citation
    Meijer, H. A. J., Pertuisot, M. H., & van der Plicht, J. (2006). High-accuracy 14C measurements for atmospheric CO2 samples by AMS. Radiocarbon, 48(3), 355-372.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653621
    DOI
    10.1017/S0033822200038807
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    In this paper, we investigate how to achieve high-accuracy radiocarbon measurements by accelerator mass spectrometry (AMS) and present measurement series (performed on archived CO2) of 14CO2 between 1985 and 1991 for Point Barrow (Alaska) and the South Pole. We report in detail the measurement plan, the error sources, and the calibration scheme that enabled us to reach a combined uncertainty of better than 3. The d13C correction and a suggestion for a span (or 2point) calibration for the 14C scale are discussed in detail. In addition, we report new, accurate values for the calibration and reference materials Ox2 and IAEA-C6 with respect to Ox1. The atmospheric 14CO2 records (1985-1991) are presented as well and are compared with other existing records for that period. The Point Barrow record agrees very well with the existing Fruholmen (northern Norway) record from the same latitude. The South Pole record shows a small seasonal cycle but with an extreme phase with a maximum on January 1st (+/13 days). Together with its generally elevated 14C level compared to the Neumayer record (coastal Antarctica), this makes our South Pole data set a valuable additional source of information for global carbon cycle modeling using 14CO2 as a constraint.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200038807
    Scopus Count
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    Radiocarbon, Volume 48, Number 3 (2006)

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