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What Is the Carbon Origin of Early-Wood?

Published online by Cambridge University Press:  19 November 2018

Sabrina G K Kudsk*
Affiliation:
Institute for Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark
Jesper Olsen*
Affiliation:
Aarhus AMS Centre (AARAMS), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
Lasse N Nielsen
Affiliation:
Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
Alexandra Fogtmann-Schulz
Affiliation:
Institute for Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark
Mads F Knudsen
Affiliation:
Institute for Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark
Christoffer Karoff
Affiliation:
Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
*
*Corresponding authors. Email: sgbn@geo.au.dk and jesper.olsen@phys.au.dk.
*Corresponding authors. Email: sgbn@geo.au.dk and jesper.olsen@phys.au.dk.

Abstract

Substantial amounts of annual radiocarbon (14C) data have recently been produced with the purpose of increasing the time resolution of 14C records used for constructing the calibration curve and for studying the occurrence of abrupt cosmic-ray events. In this study, we investigate if it is possible to resolve sub-annual scale changes in the atmospheric 14C content by measuring radiocarbon in early-wood and late-wood fractions from Danish oak. The tree-ring samples span the period 1954–1970 CE, hereby covering the peak of the bomb pulse. A least squares test comparing the atmospheric 14C content and the new sub-annual 14C record from Danish tree rings reveals that by measuring early-wood and late-wood fractions, it may be possible to resolve sub-annual variations in past atmospheric 14C levels.

Type
Trees
Copyright
© 2018 by the Arizona Board of Regents on behalf of the University of Arizona 

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Footnotes

Selected Papers from the 2nd Radiocarbon in the Environment Conference, Debrecen, Hungary, 3–7 July 2017

References

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