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Content of 14C in Marine Mammals from Northern Europe

Published online by Cambridge University Press:  18 July 2016

Ingrid U Olsson
Ingrid U Olsson*
Affiliation:
Institute of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
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Abstract

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The reservoir effect of Scandinavian sea water has been determined by dating seals and whales killed well before man's impact on the natural 14C concentration became significant. The samples were collected at different places along the Swedish coasts and in the Gulf of Finland. They derive from ad 1657 or 1658, 1868, 1875, 1894, and 1906. The EDTA treatment of bones was used to obtain collagen free from contaminants.

An elk, originating from ad 1881 was selected for comparison. A seal from ad 1899 from the Caspian Sea was also included in the investigation.

All results have been normalized to δ13C = —25‰ vs PDB. The determinations yield values of the reservoir effect in agreement with earlier results obtained from shells and mammals. The final results are discussed in light of previous variations of 14C content in the atmosphere. Using a smoother curve, the reservoir effect is slightly smaller than was hitherto believed.

An event thought to be of cosmic origin caused the count rate of both proportional and Geiger counters to increase significantly around December 4, 1978. The correction for this has been studied. The statistics for background, oxalic acid, and unknown samples, measured repeatedly after this correction, were as good as usual.

Type
Oceanography
Information
Radiocarbon , Volume 22 , Issue 3: Heidelberg , 1980 , pp. 662 - 675
Copyright
Copyright © The American Journal of Science

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