光学学报, 2015, 35 (5): 0501006, 网络出版: 2015-04-28
基于侧向散射技术的近地面气溶胶后向散射系数廓线探测
Measurements of Near-Ground Aerosol Backscattering Coefficient Profile with Side-Scatter Technique
大气光学 气溶胶后向散射系数 侧向散射激光雷达 电荷耦合器件 PM2.5质量浓度 atmospheric optics aerosol backscattering coefficient side-scatter lidar charge-coupled device PM2.5 mass concentration
摘要
气溶胶是大气中污染物PM2.5 和灰霾的主要成分，近地面的气溶胶直接影响人们的生活和生产。利用电荷耦合器件(CCD）侧向散射激光雷达系统和相应的反演方法，对探测到的数据进行处理和分析。与后向散射激光雷达对比，验证了CCD 侧向散射激光雷达探测结果的正确性。分析了2014年4月合肥西区董铺岛3 km 高度范围内气溶胶后向散射系数的特点：随时间和高度变化；天气晴好时，地面上后向散射系数与地面站PM2.5质量浓度成正比；紧贴地面有一层较厚气溶胶。实验探测结果表明基于CCD 的侧向散射激光雷达是探测近地面气溶胶浓度的一种有效的新方法。
Abstract
Aerosol is the main part of atmospheric contamination PM2.5 and haze. Near-ground aerosol affects human living and production directly. Using side-scatter lidar system based on charge-coupled device (CCD) and the retrieval method, the acquired experimental data are processed and analyzed. The detection correctness of CCD side-scatter lidar system is validated by comparing with backscattering lidar system. The characteristics of aerosol backscattering coefficient at an altitude within 3 km in April 2014 at Dongpu Island, western suburb of Hefei are analyzed as changing with time and altitude, aerosol backscattering coefficient is linear to mass concentration of PM2.5 when the weather is fine, and aerosol concentration is comparatively large near ground. The experimental results show that side-scatter lidar system based on CCD is an effective new method of exploring the aerosol concentration near ground.
史博, 陶宗明, 麻晓敏, 单会会, 赵素贵, 刘东, 谢晨波. 基于侧向散射技术的近地面气溶胶后向散射系数廓线探测[J]. 光学学报, 2015, 35(5): 0501006. Shi Bo, Tao Zongming, Ma Xiaomin, Shan Huihui, Zhao Sugui, Liu Dong, Xie Chenbo. Measurements of Near-Ground Aerosol Backscattering Coefficient Profile with Side-Scatter Technique[J]. Acta Optica Sinica, 2015, 35(5): 0501006.
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