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Uptake of Carbon for Cellulose Production in a White Oak from Western Oregon, USA

Published online by Cambridge University Press:  08 November 2017

William F Cain
Loyola Marymount University, Los Angeles, CA 90045, USA
Sheila Griffin
Department of Earth System Science, University of California, Irvine, CA 92697-3100, USA
Kevin C Druffel-Rodriguez
Department of Earth System Science, University of California, Irvine, CA 92697-3100, USA 7th Engineer Support Battalion, Alpha Company, Camp Pendleton, CA 92055, USA
Ellen R M Druffel*
Department of Earth System Science, University of California, Irvine, CA 92697-3100, USA
*Corresponding author. Email:


We report ∆14C measurements of cellulose extracted from near monthly tree ring growth for the 1960s of a white oak that grew in western Oregon, USA. Comparison with ∆14C measurements of atmospheric CO2 reveals that the tree ring ∆14C values were equal to or lower than those in atmospheric CO2 at the time of ring formation. We suggest that the low tree ring ∆14C values during the period 1962–1963 were caused by the presence of an atmospheric front or blocking between subpolar and temperate air masses that delayed the arrival of the bomb signal at the tree’s site.

Research Article
Radiocarbon , Volume 60 , Issue 1 , February 2018 , pp. 151 - 158
© 2017 by the Arizona Board of Regents on behalf of the University of Arizona 

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We regret to announce that Dr Cain passed away on January 14, 2017. Please see the obituary in this issue.



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