All day measurements of atmospheric temperature and water vapor concentration in the boundary layer by a Raman lidar

拉曼激光雷达全天测量大气温度和边界层水蒸气浓度

• 批准号: 09640527
• 负责人: ABO Makoto
• 金额: $ 1.86万
• 依托单位: Tokyo Metropolitan 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-09640527/
• 关键词: Raman lidar; boundary layer; temperature measurement; water vapor; atomic filter

Raman lidar system which can measure vertical distribution of air temperature and water vapor concentration even in the daytime with much background light in planetary boundary layer (1-2km altitude) was developed. Important techniques in this study are development of narrow bandpass filter and wavelength-tunable laser. Atomic vapor dispersive Faraday filter was developed to realize narrow bandpass filter. Using the sodium Faraday filter, the background light strength in the daytime was measured. The background light is quite large under the condition of the cloud. Dye laser and Ti: sapphire laser are chosen for wavelength-tunable laser. The vibratlonal Raman lidar for water vapor measurement and rotational Raman lidar for temperature measurement were also developed. The final evaluation on possibility, of the daytime measurement was carried out with the computer simulation.

研制了一套拉曼激光雷达系统，该系统能在背景光强的白天（1-2km高度）测量大气温度和水汽浓度的垂直分布。窄带滤光片和波长可调谐激光器的研制是本研究的重要技术。为了实现窄带滤光，研制了原子蒸气色散法拉第滤光片。使用钠法拉第滤光片，测量白天的背景光强度。在有云的条件下，背景光相当大。波长可调谐激光器选用染料激光器和钛宝石激光器。研制了用于水汽测量的振动拉曼激光雷达和用于温度测量的旋转拉曼激光雷达。最后用计算机模拟对白天测量的可行性进行了评估。

项目成果

柴田泰邦,長澤親生,阿保真他: "金属蒸気フィルターを用いたドップラーライダーによる風速測定法" 光学. Vol.27, No.11. 655-660 (1998)

Yasukuni Shibata、Chikao Nagasawa、Makoto Abo 等人：“使用金属蒸汽过滤器的多普勒激光雷达测量风速的方法”光学，第 27 卷，第 655-660 期。