Spatial distribution of radiocarbon in the southwestern Japan east sea immediately after bottom water renewal

Takafumi Aramaki, Shinichi S. Tanaka, Seiko Kushibashi, Young Il Kim, Chang Jun Kim, Gi Hoon Hong, Tomoharu Senjyu

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

In April 2001, immediately after bottom water renewal in the Japan/East Sea, 7 vertical profiles of radiocarbon were obtained from the area, including the Japan Basin and the Tsushima/Ulleung Basin. The bottom water Δ14C of the Tsushima/Ulleung Basin increased by 24‰ during 1979-2001 and was 10-15‰ higher than the values reported for the Japan Basin and Yamato Basin during 1995-2002. Within the depth interval 800-2000 m, Δ14C values at the southernmost station in the Japan Basin were much higher than at other stations, with the maximum difference in Δ14C values being more than 50‰. Based on a combination of physical observations with analysis of the Δ14C data, we concluded that the bottom water, which was formed by the sinking of surface water off Vladivostok, Russia, in late January-early February of 2001, had been widely distributed to depths below 2000 m within the southernmost Japan Basin in a timespan shorter than 2 months. However, there was no evidence that the water had been transported into the Tsushima/Ulleung Basin during the same time interval.

本文言語英語
ページ(範囲)1675-1682
ページ数8
ジャーナルRadiocarbon
55
2-3
DOI
出版ステータス出版済み - 2013
外部発表はい

All Science Journal Classification (ASJC) codes

  • Archaeology
  • Earth and Planetary Sciences(all)

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