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

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

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

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Abstract

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) SO{sub 4}{sup 2}'- 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-SO{sub 4}{sup 2-} concentrations in winter is due to long range transport of pollutants from China to Japan. (authors)

Authors:

Momoshima, N.; Sugihara, S. ^[1]; Toyoshima, T.; Nagao, Y.; Takahashi, M.; Nakamura, Y. ^[2]

Radioisotope Center, Kyushu Univ., Hakozaki, Higashi-ku, Fukuoka 812-8581 (Japan)
Graduate School of Science and Technology, Kumamoto Univ., Kurokami, Kumamoto 860-8555 (Japan)

Publication Date:: Tue Jul 15 00:00:00 EDT 2008

OSTI Identifier:: 22109364

Resource Type:: Journal Article

Journal Name:: Fusion Science and Technology

Additional Journal Information:: Journal Volume: 54; Journal Issue: 1; Conference: 8. international conference on tritium science and technology, Rochester, NY (United States), 16-21 Sep 2007; Other Information: Country of input: France; 10 refs; Journal ID: ISSN 1536-1055

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; IONS; LONG-RANGE TRANSPORT; POLLUTANTS; RAIN; SALTS; SEAS; SEASONAL VARIATIONS; SULFATES; TRITIUM

Citation Formats


                    Momoshima, N., Sugihara, S., Toyoshima, T., Nagao, Y., Takahashi, M., and Nakamura, Y. Seasonal variability of tritium and ion concentrations in rain at Kumamoto, Japan and back-trajectory analysis of air mass.  United States: N. p., 2008. 
        Web.

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                    Momoshima, N., Sugihara, S., Toyoshima, T., Nagao, Y., Takahashi, M., & Nakamura, Y. Seasonal variability of tritium and ion concentrations in rain at Kumamoto, Japan and back-trajectory analysis of air mass.  United States.

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                    Momoshima, N., Sugihara, S., Toyoshima, T., Nagao, Y., Takahashi, M., and Nakamura, Y. 2008.  
        "Seasonal variability of tritium and ion concentrations in rain at Kumamoto, Japan and back-trajectory analysis of air mass".  United States.

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@article{osti_22109364,

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

  author       = {Momoshima, N. and Sugihara, S. and Toyoshima, T. and Nagao, Y. and Takahashi, M. and Nakamura, Y.},

  abstractNote = {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) SO{sub 4}{sup 2}'- 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-SO{sub 4}{sup 2-} concentrations in winter is due to long range transport of pollutants from China to Japan. (authors)},

  doi          = {},

  url          = {https://www.osti.gov/biblio/22109364},
  journal      = {Fusion Science and Technology},

  issn         = {1536-1055},

  number       = 1,

  volume       = 54,

  place        = {United States},

  year         = {Tue Jul 15 00:00:00 EDT 2008},

  month        = {Tue Jul 15 00:00:00 EDT 2008}

}

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