2013 Fiscal Year Final Research Report
Creation of a high-sensitive detection method for methane using a PPLN-waveguide and its application to flux measurement
| Project/Area Number |
23310006
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | メタン / 地球温暖化 / レーザー分光法 / フラックス / 植生 |
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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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[Presentation] Eddy covariance observation of methane exchange in a boreal and a temperate forest ecosystem2013
Author(s)
H. Iwata, Y. Harazono, Y. Kosugi, M. Ueyama, M. Mano, K. Ono, A. Sakabe, H. Nagano, K. Takahashi, and Akira Miyata
Organizer
Synthesis Workshop on the Carbon Budget and Forest Ecosystem in the Asian Monitoring Network (The 20th Anniversary of the Takayama Site) in Takayama
Place of Presentation
Hida earth wisdom center,Takayama, Gifu, Japan
Year and Date
20131024-26
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