High-time resolution measurements of atmospheric methane by use of cavity enhanced absorption spectroscopy

利用腔增强吸收光谱法对大气甲烷进行高时间分辨率测量

• 批准号: 21710009
• 负责人: TAKAHASHI Kenshi
• 金额: $ 3万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21710009/
• 关键词: 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; 半導体レーザー; 積分型吸収分光法

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.

开发了一种采用腔增强吸收光谱（CEAS）技术的激光仪器，可以准确、精确地测量大气甲烷。所开发仪器的检测限达到 1 ppb（1 秒信号平均），这足以实时检测大气中的甲烷。该仪器在日本滋贺县的一片日本柏树林中使用，以研究森林冠层上方和内部甲烷的时空行为。将自动室测量系统与本研究中开发的基于激光的仪器相结合，从而计算树叶、树干和森林土壤与大气之间的甲烷交换通量。室通量以 15 分钟时间分辨率获得。

项目成果

Characterization of aerosol particles in the Tokyo metropolitan area using two different particle mass spectrometers

使用两种不同的粒子质谱仪表征东京都市区的气溶胶粒子

• 发表时间: 2011
• 作者: J.

近赤外レーザーによる暖温帯ヒノキ林におけるメタンフラックスの長期観測

近红外激光对暖温带柏树林甲烷通量的长期观测

• 发表时间: 2010
• 作者: 高橋けんし(他4名;1番目)
• 通讯作者: 1番目)

OH-initiated oxidation of small unsaturated alcohols

OH引发的小分子不饱和醇的氧化

• 发表时间: 2010
• 作者: K.Takahashi; M.D.Hurley; T.J.Wallington
• 通讯作者: T.J.Wallington

Field application of near-infrared laser spectroscopy : Trace gas exchange between the atmosphere and biosphere

近红外激光光谱的现场应用：大气与生物圈之间的微量气体交换

• 发表时间: 2009
• 作者: Kenshi Takahashi

Kinetics and mechanism of chlorine-atom-initiated oxidation of allyl alcohol, 3-buten-2-ol, and 2-methyl-3-buten-2-ol

氯原子引发烯丙醇、3-丁烯-2-醇和2-甲基-3-丁烯-2-醇氧化的动力学和机理

• 发表时间: 2010
• 作者: Takahashi; et al.; (他3名;1番目)
• 通讯作者: 1番目)