Geochemical cycles in the marginal seas around Japan Islands from spatial distributions of multi-radionuclides
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 |
Section | 一般 |
Research Field |
Environmental dynamic analysis
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Research Institution | Kanazawa University |
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)
|
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 |
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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Report
(4 results)
Research Products
(25 results)
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[Journal Article] Delivery mechanism of 134Cs and 137Cs in seawater off the Sanriku Coast, Japan, following the Fukushima Dai-ichi NPP accident2014
Author(s)
M. Inoue, H. Kofuji, K. Fujimoto, Y. Furusawa, K. Yoshida, S. Nagao, M. Yamamoto, Y. Hamajima, M. Minakawa
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Journal Title
Journal of Environmental Radioactivity
Volume: 137
Pages: 113-118
DOI
Related Report
Peer Reviewed
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[Journal Article] Vertical profiles of 228Ra and 226Ra activities in the Sea of Japan and their implications on water circulation.2014
Author(s)
Inoue, M., Minakawa, M., Yoshida, K., Nakano, Y., Kofuji, H., Nagao, S., Hamajima, Y., Yamamoto, M.
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Journal Title
J. Radioanal. Nucl. Chem.
Volume: 303
Issue: 2
Pages: 1309-1312
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Lateral and temporal variations in Fukushima DNPP-derived 134Cs and 137Cs in marine sediments in/around the Sado Basin, Sea of Japan.2014
Author(s)
Inoue, M., Yoneoka, S., Ochiai, S., Oikawa, S., Fujimoto, K., Yagi, Y., Honda, N., Nagao, S., Yamamoto, M., Hamajima, Y., Murakami, T., Kofuji, H., Misonoo, J.
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Journal Title
J. Radioanal. Nucl. Chem.
Volume: 303
Issue: 2
Pages: 1313-1316
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Lateral and temporal variations in Fukushima DNPP-derived 134Cs and 137Cs in marine sediments in/around the Sado Basin, Sea of Japan.2014
Author(s)
M. Inoue, S. Yoneoka, S. Ochiai, S. Oikawa, K. Fujimoto, Y. Yagi, N. Honda, S. Nagao, M. Yamamoto, Y. Hamajima, T. Murakami, H. Kofuji, J. Misonoo
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Journal Title
J. Radioanal. Nucl. Chem.
Volume: accepted
Related Report
Peer Reviewed
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[Journal Article] Ra-228/Ra-226 ratio and Be-7 concentrations in the Sea of Japan as indicators for water transport: comparison with migration pattern of Fukushima Dai-ichi NPP-derived Cs-134 and Cs-1372013
Author(s)
Inoue, M., Furusawa, Y., Fujimoto, K., Minakawa, M., Kofuji, H., Nagao, S., Yamamoto, M., Hamajima, Y., Yoshida, K., Hayakawa, K., Oikawa, S., Misonoo, J. and Isoda, Y.
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Journal Title
Journal of Environmental Radioactivity
Volume: 126
Pages: 176-187
DOI
Related Report
Peer Reviewed
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[Journal Article] Spatial variations of low levels of 134Cs and 137Cs in seawaters within the Sea of Japan after the Fukushima Dai-ichi Nuclear Power Plant accident.2013
Author(s)
Inoue, M., Kofuji, H., Murakami, T., Oikawa, S., Yamamoto, M., Nagao, S., Hamajima, Y. and Misonoo, J.
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Journal Title
Appl. Radiat. Isot.
Volume: 81
Pages: 340-343
Related Report
Peer Reviewed
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[Journal Article] Spatial variations of low levels of 134Cs and 137Cs in seawaters within the Sea of Japan after the Fukushima Dai-ichi Nuclear Power Plant accident2013
Author(s)
Inoue, M., Kofuji, H., Oikawa, S., Murakami, T., Yamamoto, M., Nagao, S., Hamajima, Y., and Misonoo, J.
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Journal Title
Applied Radiation and Isotopes
Volume: 81
Pages: 340-343
DOI
Related Report
Peer Reviewed
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[Journal Article] Low-levels of 134Cs and 137Cs in surface seawaters around the Japanese Archipelago after the Fukushima Dai-ichi Nuclear Power Plant accident in 2011.2012
Author(s)
Inoue, M., Kofuji, H., Nagao, S., Yamamoto, M., Hamajima, Y., Fujimoto, K., Yoshida, K., Hayakawa, K., Suzuki, A., Takashiro, H., Minakawa, M.
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Journal Title
Geochem. J.
Volume: 46
Pages: 311-320
NAID
Related Report
Peer Reviewed
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[Journal Article] Spatial variations of 226Ra, 228Ra, and 228Th activities in seawater from the eastern East China Sea.2012
Author(s)
Inoue, M., Yoshida, K., Minakawa, M., Kiyomoto, Y., Kofuji, H., Nagao, S., Hamajima, Y., Yamamoto, M.
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Journal Title
Geochem. J.
Volume: 46
Pages: 429-441
NAID
Related Report
Peer Reviewed
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[Journal Article] ^<134> Cs and^<137> Cs activities in coastal seawater along Northern Sanriku and Tsugaru Strait, northeastern Japan2011
Author(s)
Inoue, M., Kofuji, H., Hamajima, Y., Nagao, S., Yoshida, K. and Yamamoto, M.
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Journal Title
Journal of Environemental Radioactivity
Volume: 111
Pages: 116-119
DOI
Related Report
Peer Reviewed
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[Presentation] Lateral distributions of 228Th/228Ra and 228Ra/226Ra ratios2013
Author(s)
Y. Furusawa, M. Inoue, S. Nagao, M. Yamamoto, Y. Hamajima, H. Kofuji, K. Yoshida, Y. Nakano, K. Fujimoto, A. Morimoto, T. Takikawa, Y. Isoda
Organizer
5th Asia-Pacific Symposium on Radiochemistry
Place of Presentation
金沢市文化ホール(石川県)
Related Report
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