14C dating of polar ice |
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| Authors: | M. Andree E. Moor J. Beer H. Oeschger B. Stauffer G. Bonani H.J. Hofmann E. Morenzoni M. Nessi M. Suter W. Wölfli |
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| Affiliation: | Physics Institute, University of Berne, CH-3012 Berne, Switzerland;Institut für Mittelenergiephysik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland |
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| Abstract: | We have dated ice core samples by 14C AMS to show that this method extends other ice dating methods and enables direct comparison with 14C related climatic events found elsewhere. For the measurement we use the CO2 that was occluded together with the air at the time of ice formation. To extract the CO2 we crush the samples with a milling cutter. For a 14C AMS measurement the CO2 content of about 10 kg of cleaned ice (0.25 cm3) has to be converted to amorphous carbon. First 14C results on the Dye 3 (Greenland) ice core are in good agreement with other age determinations. |
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