Development of a measuring system of column-averaged mixing ratio of greenhouse gases with an optical spectrum analyzer operated in near infrared region

近红外光谱分析仪温室气体列均混合比测量系统的开发

• 批准号: 23340140
• 负责人: NAGAHAMA Tomoo
• 金额: $ 13.15万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23340140/
• 关键词: 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

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.

我们新开发了一种二氧化碳和甲烷柱均混合比的测量系统，配有近红外区域的光谱分析仪。我们对波长分辨率和灵敏度等仪器参数进行了评估，发现如果使用边缘有狭缝的光纤，则可以达到预期的分辨率。接下来，我们开发了一个程序，用于从观察到的光谱中检索列平均混合比。仿真结果表明，我们可以从信噪比为500的光谱中反演精度在1%的混合比。我们将我们的系统获得的混合比与高分辨率FTIR系统进行了比较，发现我们的系统获得的强度波动估计在3%左右，没有达到预期值。我们将改进光纤和狭缝系统的安装机制来解决这个问题。

项目成果

光スペクトラムアナライザを使った大気中の二酸化炭素の高精度測定法の開発・実用化

光谱分析仪高精度大气二氧化碳测量方法的研制及实际应用

• 发表时间: 2011
• 作者: S. Yabu;R. Mizuta;H. Yoshimura;Y. Kuroda;and H. Mukougawa;草苅聡
• 通讯作者: 草苅聡

Site report on Moshiri and Rikubetsu

关于 Moshiri 和 Rikubetsu 的现场报告

• 发表时间: 2013
• 作者: Nagahama;T.;Mizuno;A.;Matsumi;Y.
• 通讯作者: Y.

光スペクトラムアナライザを使った大気中の二酸化炭素測定法の高精度化

使用光谱分析仪提高大气二氧化碳测量的准确性

• 发表时间: 2012
• 作者: 草苅 聡;長濱 智生;荻野 竜樹
• 通讯作者: 荻野 竜樹

つくばにおけるフーリエ変換型分光計を用いたメタン高度分布観測

筑波利用傅里叶变换光谱仪观测甲烷高度分布

• 发表时间: 2011
• 作者: 村田 功;中島 英彰;森野 勇
• 通讯作者: 森野 勇

研究紹介－温室効果ガスの赤外分光観測

研究简介-温室气体红外光谱观测