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Atmospheric Radiocarbon: Implications for the Geomagnetic Dipole Moment

Published online by Cambridge University Press:  18 July 2016

R S Sternberg  and
P E Damon
R S Sternberg*
Affiliation:
Laboratory of Isotope Geochemistry, Department of Geosciences, University of Arizona, Tucson, Arizona 85721
P E Damon
Affiliation:
Laboratory of Isotope Geochemistry, Department of Geosciences, University of Arizona, Tucson, Arizona 85721
*
∗ Now at Department of Geology, Franklin and Marshall College P O Box 3003, Lancaster, Pennsylvania 17604
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The geomagnetic field is one of the major physical fields of the earth. Because its source is fluid motion in the outer core, it exhibits temporal changes, called secular variation, which are quite rapid compared to most geologic phenomena. The prehistoric secular variation is usually inferred from paleomagnetic data. We will discuss here how changes in the atmospheric 14C content can be used to gain additional insight into the behavior of the dipole moment over the past 8500 years. By rewriting the differential equations representing the 14C geochemical cycle in finite-difference form, we are able to convert the atmospheric 14C activity record into an equivalent radiocarbon dipole moment.

Type
I. Natural 14C Variations
Information
Radiocarbon , Volume 25 , Issue 2: 11th International Radiocarbon Conference , 1983 , pp. 239 - 248
Copyright
Copyright © The American Journal of Science 

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