Development of DIAL for molecules related to earth warming

开发与地球变暖相关的分子 DIAL

• 批准号: 09650053
• 负责人: UCHIUMI Michihiro
• 金额: $ 1.92万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650053/
• 关键词: laser radar; earth warming; tunable solid-state laser; remote sensing; differential absorption lidar; Ti : sapphire laser; carbon dioxide; methane; 可変波長固定レーザー; 波長可変固体レーザー; チサンサファイヤレーザー

Range-resolved differential absorption lidar (DIAL) has already been in the practical use for the detection of naturally abundant atmospheric ozone and water vapor. It has also been used in the measurements of some highly abundant species of pollutant molecules. Recent progress in high-power tunable IR sources makes the range-resolved detection of other important species possible. We have developed a high-power Ram an laser which is continuously tunable up to 3.2 mum and pumped by a Ti : sapphire laser. Using the HITRAN data base, we surveyed useful absorption lines 'for range-resolved DIAL measurement in the wavelength rage from one to five micrometers, and found that CO_2, CO, N_2O, CH_4 in the troposphere were detectable. A detailed simulation of the DIAL measurement of these species was made for many absorption lines, taking into account the interference from other species.We performed DIAL measurement of CO_2 which has a Ti : sapphire laser. The Ti : sapphire laser has an output energy of 30 mJ with a bandwidth of 20 pm.We have succeeded in observing horizontal distributions of CO_2 in the atmosphere within the detection ranges from 300 m to 700 m with rage resolution of 100m and with time resolution of 10 minutes.

距离分辨差分吸收激光雷达(DIAL)已经用于探测自然丰富的大气臭氧和水汽。它还被用于一些高度丰富的污染物分子的测量。高功率可调谐红外光源的最新进展使其他重要物种的距离分辨检测成为可能。我们研制了一台连续可调至3.2微米的高功率Ram-An激光器，它由钛宝石激光器泵浦。利用HITRAN数据库，我们在1-5微米的波长范围内测量了用于距离分辨Dial测量的有用吸收谱线，发现对流层中的CO_2、CO、N_2O、CH_4是可探测到的。考虑到其他物种的干扰，对多条吸收谱线的Dial测量进行了详细的模拟，并用钛宝石激光器对CO2进行了Dial测量。钛宝石激光器的输出能量为30mJ，带宽为20pm，在300~700m的探测范围内，以100m的距离分辨率和10min的时间分辨率，成功地观测到了大气中CO2的水平分布。

项目成果

K. Ikuta, N. Yoshikane, N. Vasa, Y. Oki, M. Maeda, M. Uchiumi, Y.: "Differential Absorption Lidar at 1.67 um for Remote Sensing of Methane Leakage" Jpn. J. Appl. Phys.A38,part1・1. 110-114 (1999)

K. Ikuta、N. Yoshikane、N. Vasa、Y. Oki、M. Maeda、M. Uchiumi、Y.：“1.67 um 差分吸收激光雷达用于甲烷泄漏遥感”J. Appl. ，第1・1部分。110-114（1999）

M.Uchiumi and M.Maeda: "DIAL measurement of Atmospheric Molecules Related to Earth Warming, II" Plasma Engineering Laboratory Annual Progress Report. 389. 7-7 (1998)

M.Uchiumi 和 M.Maeda：“与地球变暖相关的大气分子的 DIAL 测量，II”等离子体工程实验室年度进展报告。

柳田達哉,内海通弘,植田清隆,村岡克紀,前田三男,内野 修: "地球温暖化分子計測用差分吸収ライダーの開発" 九州大学 電離気体実験施設報告. 7. 61-62 (1997)

Tatsuya Yanagida、Michihiro Utsumi、Kiyotaka Ueda、Katsunori Muraoka、Mitsuo Maeda、Osamu Uchino：“用于测量全球变暖分子的差分吸收激光雷达的开发”九州大学电离气体实验设施报告书 7. 61-62 (1997)。

M. Uchiumi, M. Maeda: "DIAL Measurement of Atmospheric Molecules Related to Earth Warming" Plasma Engineering Laboratory Annual Progress Report. 374. 7-7 (1997)

M. Uchiumi、M. Maeda：“与地球变暖相关的大气分子的 DIAL 测量”等离子体工程实验室年度进展报告。

T.Yanagida, H.Uchida, M.Uchiumi, K.Ueda, K.Muraoka, N.J.Vasa, M.Ikuta, Y.Oki and M.Maeda: "Development of DIAL for measurements of CO_2, CO,N_2O,CH_4 in the troposphere" Report of Institute for Ionized gas and Laser Research, Kyushu University. 8. 53-54 (

T.Yanagida、H.Uchida、M.Uchiumi、K.Ueda、K.Muraoka、N.J.Vasa、M.Ikuta、Y.Oki 和 M.Maeda：“开发用于测量 CO_2、CO、N_2O、CH_4 的 DIAL