Direct observation of the rapid turnover of the Japan Sea bottom water by means of AMS radiocarbon measurement

被引：52

作者：

Kumamoto, Y

Yoneda, M

Shibata, Y

Kume, H

Tanaka, A

Uehiro, T

Morita, M

Shitashima, K

机构：

[1] Japan Marine Sci & Technol Ctr, Ocean Res Dept, Yokosuka, Kanagawa, Japan

[2] Natl Inst Environm Studies, Environm Chem Div, Tsukuba, Ibaraki, Japan

[3] Abiko Res Lab, Cent Res Inst Elect Power Ind, Abiko, Chiba 1646, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 05期

关键词：

D O I：

10.1029/98GL00359

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Increase of C-14 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 pars which coincides with results obtained by other chemical tracers. By an application of the estimated turnover time to a box model of Delta(14)C change, pre-bomb surface Delta(14)C in the northern Japan Sea where the bottom water is formed is calculated to be ca. -90 parts per thousand.

引用

页码：651 / 654

页数：4

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