A correction for in situ 14C in Antarctic ice with 14CO
Publication date
1995
Authors
Roijen, J.J. van
Borg, K. van der
Jong, A.F.M. de
Oerlemans, J.
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Article
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Abstract
We use a dry extraction method to obtain trapped C02 of shallow ice cores from a blue ice area of East Antarctica.
In-situ-produced 14C extracted in 14CO2 and 10CO concentrations show a mean ratio of 3.4 ± 0.4. Correction for insitu
14CO2 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.