Seasonal variability of tritium and ion concentrations in rain at Kumamoto, Japan and back-trajectory analysis of air mass

N. Momoshima, Shinji Sugihara, T. Toyoshima, Y. Nagao, M. Takahashi, Y. Nakamura

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

Tritium and major ion concentrations in rain were analyzed in Kumamoto, Japan between 2001 and 2006 to examine present tritium concentration and seasonal variation. The average tritium concentration was 0.36 ± 0.19 Bq/L (n=104) and higher tritium concentrations were observed in spring than the other seasons. Among the ions, non-sea-salt (nss) SO42- showed higher concentration in winter while other ions did not show marked increase in winter. Based on the back-trajectory analyses of air masses, the increase in tritium concentrations in spring arises from downward movement of naturally produced tritium from stratosphere to troposphere, while the increase of the nss-SO42- concentrations in winter is due to long range transport of pollutants from China to Japan.

本文言語英語
ページ(範囲)293-296
ページ数4
ジャーナルFusion Science and Technology
54
1
DOI
出版ステータス出版済み - 1月 1 2008

!!!All Science Journal Classification (ASJC) codes

  • 土木構造工学
  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 材料科学(全般)
  • 機械工学

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