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Meteorological parameters contributing to variability in 222Rn activity concentrations in soil gas at a site in Sapporo, Japan
| Title: | Meteorological parameters contributing to variability in 222Rn activity concentrations in soil gas at a site in Sapporo, Japan |
| Authors: | Fujiyoshi, Ryoko Browse this author →KAKEN DB | | Sakamoto, Keita Browse this author | | Imanishi, Tsukushi Browse this author | | Sumiyoshi, Takashi Browse this author →KAKEN DB | | Sawamura, Sadashi Browse this author | | Vaupotic, Janja Browse this author | | Kobal, Ivan Browse this author |
| Keywords: | 222Rn | | Soil gas | | Continuous monitoring | | Meteorological parameters | | Seismic effects |
| Issue Date: | 15-Oct-2006 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Science of The Total Environment |
| Volume: | 370 |
| Issue: | 1 |
| Start Page: | 224 |
| End Page: | 234 |
| Publisher DOI: | 10.1016/j.scitotenv.2006.07.007 |
| PMID: | 16904163 |
| Abstract: | Continuous 222Rn monitoring in soil gas since November 22, 2004 has revealed variability in activity concentration with time in the semi-natural woods on the campus of Hokkaido University in Sapporo, Japan. Among various factors affecting soil radon levels and variability, temperature was found to be dominant during three seasons when activity concentrations of 222Rn showed a diurnal high and nocturnal low with a boundary around 10 o'clock in the morning. This pattern was disturbed by low pressure fronts with occasional rain. The activity gradually decreased as soil temperatures decreased from late November to mid-December. After the ground surface was completely covered with snow, soil radon levels became low with a small fluctuation. There were several peaks of 222Rn on the time-series chart in winter. Those peaks appearing in early winter and early spring may be interpreted by considering meteorological parameters. In a few cases, the radon activity suddenly increased with increasing pressure in the soil at a depth of 10 cm, which may be associated with subsurface events such as seismic activity in the area. |
| Relation: | http://www.sciencedirect.com/science/journal/00489697 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/15422 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤吉 亮子
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