| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
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| Outline of Final Research Achievements |
A new technique for quantifying nitrous oxide (N2O) in the terrestrial atmosphere has been developed, because N2O is an important greenhouse gas and thus its atmospheric processes should be understood accurately. Since the background concentration of N2O in the troposphere is about 330 ppb, we utilized a semiconductor laser-based high-sensitive spectroscopy technique for in-situ and real-time detection of atmospheric N2O. The laser spectrometer has been combined with a closed chamber system that has also been developed in this study, thereby we made a performance test of our system by observations of N2O emission from the soil surfaces in a temperate forest. No significant emission has been observed, which is indicative that denitrification processes in the surface soil are rather ineffective.
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