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A correction for in situ 14C in Antarctic ice with 14CO

By J.J. van Roijen, K. van der Borg, A.F.M. de Jong and J. Oerlemans

Abstract

We use a dry extraction method to obtain trapped C02 of shallow ice cores from a blue ice area of East Antarctica.\ud In-situ-produced 14C extracted in 14CO2 and 10CO concentrations show a mean ratio of 3.4 ± 0.4. Correction for insitu\ud 14CO2 resulted in ice ages within 7-13 ka. The accumulation and ablation rates determined from the in-situ production of\ud 7-20 cm yr-1 and 10-13 cm yr-1, respectively, agree with field measurements, and thus indicate close to total efficiency of\ud extraction

Topics: Natuur- en Sterrenkunde
Year: 1995
OAI identifier: oai:dspace.library.uu.nl:1874/22247
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