| Budget Amount *help |
¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2011: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
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| Research Abstract |
In this work, a high-sensitive technique for in-situ detection of methane has been explored, in which a mid-infrared laser together with a long-path absorption cell have been utilized. The mid-infrared laser was generated with a PPLN-waveguide coupled to near-infrared lasers. The system enabled us to measure atomspheric methane in-situ on a real-time basis. The methane detection system was utilized to investigate methane dynamics in a forest environment. In a temperate forest of Japanese cypress trees, methane fluxes from cypress leaves and soil surface of the forest floor were observed in-situ.
Results showed that cypress trees had insignificant contribution as a source/sink of atmospheric methane.
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