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Raman激光雷达是用于大气成分探测与特性研究的有效工具.介绍了中科院安徽光学精密机械研究所自行研制的一台用于测量低对流层大气CO2时空分布的Raman激光雷达系统,并进行了一系列观测实验和对比分析.系统选用波长355nm的紫外激光作为光源,利用光子计数卡双通道采集大气中N2和CO2的Raman后向散射信号与Li-7500型H2O/CO2分析仪进行对比标定,通过反演获得了大气CO2水平与垂直方向时空分布廓线,并且获得了合肥地区大气边界层CO2的夜变化趋势.结果表明,大气CO2在空间的分布相对均匀,Raman激光雷达与CO2分析仪变化趋势一致性较好,能够对大气CO2时空分布进行有效、连续的观测.
Raman laser radar is an effective tool for the study of atmospheric composition detection and characterization.A Raman lidar system developed by Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, is introduced, and a series of Raman lidar systems are used to measure temporal and spatial distribution of atmospheric CO2 in the lower troposphere. Observation experiment and comparative analysis.The Raman backscattering signal of N2 and CO2 in the atmosphere was acquired by photon counting dual-channel photon counting card using UV laser with wavelength of 355nm as the light source and compared with Li-7500 H2O / CO2 analyzer, The temporal and spatial profiles of atmospheric CO2 horizon and vertical direction were obtained and the night-time trend of atmospheric CO2 in the Hefei area was obtained.The results showed that the spatial distribution of atmospheric CO2 was relatively uniform and the trend of Raman lidar and CO2 analyzer was consistent It has better sex and can observe the temporal and spatial distribution of atmospheric CO2 effectively and continuously.