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    Regional Radiocarbon Effect Due to Thawing of Frozen Earth

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    Author
    Damon, P. E.
    Burr, George
    Peristykh, A. N.
    Jacoby, G. C.
    D'Arrigo, R. D.
    Issue Date
    1996-01-01
    
    Metadata
    Show full item record
    Citation
    Damon, P. E., Burr, G., Peristykh, A. N., Jacoby, G. C., & D'Arrigo, R. D. (1996). Regional radiocarbon effect due to thawing of frozen earth. Radiocarbon, 38(3), 597-602.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653721
    DOI
    10.1017/S0033822200030125
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861-1885 at ca. +/3.5 precision shows no evidence of an anomalous 11-yr cycle of 14C near the Arctic Circle in the Mackenzie River area. However, the Delta-14C measurements are lower on average by 2.7 +/0.9 (sigma) relative to 14C measurements on tree rings from the Pacific Northwest (Stuiver and Braziunas 1993). We attribute this depression of 14C to thawing of the ice and snow cover followed by melting of frozen earth that releases trapped 14C-depleted CO2 to the atmosphere during the short growing season from May through August. Correlation of Delta-14C with May-August estimated temperatures yields a correlation index of r = 0.60. The reduction in Delta-14C is dominated by seven years of anomalous depletion. These years are 1861, 1867-1869, 1879-1880 and 1883. The years 1867-1869 are coincident with a very strong ENSO event.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200030125
    Scopus Count
    Collections
    Radiocarbon, Volume 38, Number 3 (1996)

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