Abstract
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.
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