A correction for in-situ (super 14) C in Antarctic ice with (super 14) CO
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 14C02 and 14C0 concentrations show a mean ratio of 3.4 ± 0.4. Correction for insitu 14C02 resulted in ice ages within 7-13 ka. The accumulation and abl...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Radiocarbon
1995
|
Subjects: | |
Online Access: | https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1660 |
Summary: | 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 14C02 and 14C0 concentrations show a mean ratio of 3.4 ± 0.4. Correction for insitu 14C02 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. |
---|