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    Possibility of Climatically Induced Variations in the 14C and 13C Enrichment Patterns as Recorded by a 3000-Year-Old Norwegian Pine

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    Author
    Harkness, D. D.
    Miller, B. T.
    Issue Date
    1980-01-01
    
    Metadata
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    Citation
    Harkness, D. D., & Miller, B. F. (1980). Possibility of climatically induced variations in the 14C and 13C enrichment patterns as recorded by a 300-year-old Norwegian pine. Radiocarbon, 22(2), 291-298.
    Publisher
    American Journal of Science
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/652437
    DOI
    10.1017/S0033822200009589
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    The secular patterns of Deltaand delta-13C measured in wood cellulose are compared with a palaeotemperature index published for the immediate growth region. 14C enrichment shows an overall decrease of ca 20 per mil (Delta) during the 18th and 19th centuries with shorter term (decade) variations superimposed on the general trend. Measured Delta values correlate significantly with the average mean summer temperatures and indicate a linear coefficient of ca -10.2 per mil C-1. Short-term variations in the natural concentration of 14C which are closely related to climatic change may reflect the latitudinal dependence for atmospheric mixing. The secular trend in delta-13C covers a range of 2 per mil but variations of this magnitude reflect influences other than those directly associated with climatic change, eg, possible assimilation of recycled biospheric CO2 during early life and post AD 1850 anthropogenic effects. No evidence was found to suggest a significant correlation between delta-13C and the mean atmospheric temperature during summer growth periods.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200009589
    Scopus Count
    Collections
    Radiocarbon, Volume 22, Number 2 (1980)

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