Development of a measuring system of column-averaged mixing ratio of greenhouse gases with an optical spectrum analyzer operated in near infrared region
| Project/Area Number |
23340140
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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 |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Nagoya University |
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Principal Investigator |
NAGAHAMA Tomoo 名古屋大学, 太陽地球環境研究所, 准教授 (70377779)
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| Co-Investigator(Kenkyū-buntansha) |
MIZUNO Akira 名古屋大学, 太陽地球環境研究所, 教授 (80212231)
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| Co-Investigator(Renkei-kenkyūsha) |
MAEZAWA Hiroyuki 大阪府立大学, 理学系研究科, 准教授 (00377780)
MURATA Isao 東北大学, 大学院・環境科学研究科, 准教授 (00291245)
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| Research Collaborator |
TANADA Ryo 名古屋大学, 大学院・理学研究科, 大学院生
YASHIMA Shimpei 名古屋大学, 大学院・理学研究科, 大学院生
KUSAKARI Satoshi 名古屋大学, 大学院・工学研究科, 大学院生
FUJIMORI Takaaki 名古屋大学, 全学技術センター, 技術職員
IBUKI Norio 京都教育大学, 名誉教授
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥20,540,000 (Direct Cost: ¥15,800,000、Indirect Cost: ¥4,740,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2012: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥13,780,000 (Direct Cost: ¥10,600,000、Indirect Cost: ¥3,180,000)
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| Keywords | 地球環境システム / 温室効果ガス / 地球観測 / リモートセンシング |
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| Research Abstract |
We have newly developed a measuring system of column-averaged mixing ratio of carbon dioxide and methane with an optical spectrum analyzer operated in near infrared region. We made an evaluation of the instrumental parameters such as a resolution in wavelength and sensitivity, and have found that the estimated resolution was achieved to an expected value if we used an optical fiber with a slit at the edge. Next, we developed a program to retrieve a column-averaged mixing ratio from an observed spectrum. Simulation results showed that we can retrieve the mixing ratio within an accuracy of 1% from the spectrum whose signal-to-noise ratio is 500. We had made a comparison between the mixing ratio obtained with our system and a high-resolution FTIR system, and have found that fluctuation of the intensity obtained with our system was estimated to be about 3%, which is not achieved to the expected value. We will improve a mount mechanism of the fiber and slit system to resolve this problem.
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Report
(4 results)
Research Products
(15 results)
