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Accelerator mass spectrometry and ice core research

1987; Elsevier BV; Volume: 29; Issue: 1-2 Linguagem: Inglês

10.1016/0168-583x(87)90235-7

1872-9584

H. Oeschger,

Pleistocene-Era Hominins and Archaeology

AMS has opened up the possibility of measuring 10Be and 36Cl on samples of 1 kg of ice and 14C on CO2 extracted from 10 kg of ice. The 10Be data of Greenland ice cores show fluctuations which are correlated with the short-term (200 yr) 14C variations observed in tree-rings. Also major climatic changes due to the corresponding precipitation rate changes are reflected in the 10Be concentrations. First 14C results are promising. Precise 14C dating would help to synchronize the climatic events in the two hemispheres during the glacial-postglacial transition. 36Cl/10Be ratio data show a strong scatter, probably due to a different geochemical behaviour of Cl and Be.