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A Correction for In-Situ14C in Antarctic Ice with 14CO

Published online by Cambridge University Press:  18 July 2016

Job Van Rouen ,
Klaas Van Der Borg ,
Arie De Jong  and
Johannes Oerlemans
Job Van Rouen
Affiliation:
Department of Subatomic Physics, Universiteit Utrecht, P.O. Box 80,000, NL-3508 TA Utrecht The Netherlands
Klaas Van Der Borg
Affiliation:
Department of Subatomic Physics, Universiteit Utrecht, P.O. Box 80,000, NL-3508 TA Utrecht The Netherlands
Arie De Jong
Affiliation:
Department of Subatomic Physics, Universiteit Utrecht, P.O. Box 80,000, NL-3508 TA Utrecht The Netherlands
Johannes Oerlemans
Affiliation:
Institute for Marine and Atmospheric Research Utrecht, Universiteit Utrecht, P.O. Box 80,000 NL-3508 TA Utrecht, The Netherlands
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Abstract

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We use a dry extraction method to obtain trapped CO2 of shallow ice cores from a blue ice area of East Antarctica. In-situ-produced 14C extracted in 14CO2 and 14CO concentrations show a mean ratio of 3.4 ± 0.4. Correction for in-situ14CO2 resulted in ice ages within 7–13 ka. The accumulation and ablation rates determined from the in-situ production of 7–20 cm yr−1 and 10–13 cm yr−1, respectively, agree with field measurements, and thus indicate close to total efficiency of extraction.

Type
I. 14C in the Reconstruction of Past Environments
Information
Radiocarbon , Volume 37 , Issue 2 , 1995 , pp. 165 - 169
Copyright
Copyright © the Department of Geosciences, The University of Arizona 

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