2010 Fiscal Year Final Research Report
High-time resolution measurements of atmospheric methane by use of cavity enhanced absorption spectroscopy
| Project/Area Number |
21710009
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Kyoto University |
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Principal Investigator |
TAKAHASHI Kenshi Kyoto University, 生存圏研究所, 准助教 (10303596)
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| Project Period (FY) |
2009 – 2010
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| Keywords | キャビティ増幅吸収分光法 / 超高感度分析 / 迅速分析 / レーザー / メタン |
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| Research Abstract |
A laser-based instrument using a technique of cavity enhanced absorption spectroscopy (CEAS) was developed to measure atmospheric methane accurately and precisely. The limit-of-detection of the developed instrument achieved 1 ppb for 1 second signal averaging, which is enough high to detect atmospheric methane on a real-time basis. The instrument was utilized in a Japanese cypress forest in Shiga prefecture, Japan, to investigate the spatio-temporal behavior of methane above and within the forest canopy. An automated chamber measurement system was coupled to the laser-based instrument developed in this study, thereby methane exchange fluxes between the foliage, trunk, and forest soils and the atmosphere were calculated. The chamber fluxes were obtained with 15-min time resolution.
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[Journal Article] Characterization of aerosol particles in the Tokyo metropolitan area using two different particle mass spectrometers2011
Author(s)
J.-H.Xing, K.Takahashi, A.Yabushita, T.Kinugawa, T.Nakayama, Y.Matsumi, K.Tonokura, A.Takami, T.Imamura, K.Sato, M.Kawasaki, T.Hikida, A.Shimono
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Journal Title
Aerosol Sci.Tech. 45
Pages: 315-326
Peer Reviewed
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