| Project/Area Number |
24510011
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kanazawa University |
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Principal Investigator |
INOUE Mutsuo 金沢大学, 環日本海域環境研究センター, 助教 (60283090)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Masayoshi 金沢大学, 環日本海域環境研究センター, 教授 (10121295)
NAGAO Seiya 金沢大学, 環日本海域環境研究センター, 教授 (20343014)
HAMAJIMA Yasunori 金沢大学, 環日本海域環境研究センター, 助教 (60172970)
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| Co-Investigator(Renkei-kenkyūsha) |
FUJIMOTO Ken 水産総合研究センター中央水産研究所, 海洋生産部, 研究員 (20371841)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 海洋化学 / 放射性核種 / ガンマ線計測 / 日本海 / 物質循環 / ラジウム / セシウム / 福島第一原発事故 / ベリリウム |
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| Outline of Final Research Achievements |
We applied low-background gamma-spectrometry to conduct an investigations of spatial variations of 226Ra, 228Ra, 137Cs, 134Cs, 7Be, and 228Th activities in marginal seas around the Japan Islands; the Sea of Japan, the East China Sea, and the southwestern Okhotsk Sea. We could elucidate the flow patterns of water masses (e.g., lateral and vertical water circulation) from 228Ra/226Ra ratio and 137Cs and 7Be activities and migration pattern of particles and reactive components from 228Th/228Ra ratio in these areas. We also clarified contamination levels of radiocesium in these areas after the Fukushima Dai-ichi Nuclear Power Plant accident from 134Cs and 137Cs activities.
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