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Kumamoto et al. 1998

Kumamoto, Y., Yoneda, M., Shibata, Y., Kume, H., Tanaka, A., Uehiro, T., Morita, M. and Shitashima, K. (1998). Direct observation of the rapid turnover of the Japan Sea bottom water by means of AMS radiocarbon measurement. Geophysical Research Letters 25: doi: 10.1029/98GL00359. issn: 0094-8276.

Increase of 14C in the bottom water of the Japan Sea for the last 16 years (1979--1995) was observed by means of AMS radiocarbon measurement. This increment is due to penetration of surface bomb radiocarbon, which obviously suggests a rapid turnover of the bottom water of the Japan Sea. The turnover time is estimated to be ca. 100 years which coincides with results obtained by other chemical tracers. By an application of the estimated turnover time to a box model of Δ14C change, pre-bomb surface Δ14C in the northern Japan Sea where the bottom water is formed is calculated to be ca. -90?. ¿ 1998 American Geophysical Union

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	Abstract

Keywords
Oceanography, Biological and Chemical, Carbon cycling, Oceanography, Biological and Chemical, Chemical tracers, Oceanography, Biological and Chemical, Geochemistry, Oceanography, Biological and Chemical, Radioactivity and radioisotopes

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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