Investigation on Greenhouse Gases in Soil in the Tokyo Metropolitan Area
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概要
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Methane is one of the greenhouse gases as well as carbon dioxide (CO<SUB>2</SUB>), nitrous oxide (N<SUB>2</SUB>O) and chlorofluorocarbons (CFCs), which have influence on global warming. Theaverage increase of atmospheric methane during the last decade has bcen estimated at abaut 1% per year.<BR>Methane in soil is usually produced by methane-producing bacteria, and this process is assumed as one of the sources for atmospheric methane in the Tokyo metropolitan area. To measure the concentration of methane by gas chromatograph, we sampled air in the soil of 80 cm in depth at 330 sites which were selected at random. As a result, most of the sites showing the concentration of 500 ppm or more were found in the areas of Sumida, Adachi and Katsushika wards, and also along Tama River. It was also found that the methane concentration in soil was higher in summer (Jyly to september) than in winter (February).
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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