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Transfer of Bomb 14C to the Ocean Surface

Published online by Cambridge University Press:  18 July 2016

Reidar Nydal ,
Knut Lövseth  and
Fred H Skogseth
Reidar Nydal
Affiliation:
Radiological Dating Laboratory, The Norwegian Institute of Technology, Trondheim, Norway
Knut Lövseth
Affiliation:
Radiological Dating Laboratory, The Norwegian Institute of Technology, Trondheim, Norway
Fred H Skogseth
Affiliation:
Radiological Dating Laboratory, The Norwegian Institute of Technology, Trondheim, Norway
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Abstract

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Additional 14C data from the atmosphere and ocean have been provided since the ninth 14C conference in 1976. At the moment, one sampling station in the troposphere in each hemisphere seems to give sufficient accuracy for exchange studies. The 14C concentration in the troposphere in December 1978 constituted a mean value of 30 ± 1 percent (Δ14C) above normal level, a concentration that has been reduced to about one half during 12 years. 14C measurements have been performed with intervals of 1 to 4 months in the surface water of the Atlantic, Pacific, and Indian Oceans. In addition to the 14C data observed, the salinity and temperature are also measured. Because of earlier objections against storing sea water in steel drums on board ships for months before treatment, the CO2 has now been flushed out immediately after collection. The reliability of previous measurements has been confirmed with 10 parallel samples. 14C concentration in ocean surface on each location shows some seasonal variation due to variable exchange of water with deeper layers.

Information

Type
Oceanography
Information
Radiocarbon , Volume 22 , Issue 3: Heidelberg , 1980 , pp. 626 - 635
Copyright
Copyright © The American Journal of Science

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