Raman-Mie激光雷达测量对流层大气气溶胶光学特性  

Tropospheric Aerosols Optical Properties Measured by a Raman-Mie Lidar

作　　者：吴德成[1] 刘博[1,2] 戚福弟[1] 范爱媛[1] 王邦新[1] 钟志庆[1] 伯广宇[1] 刘东[1] 周军[1] 王英俭[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室,安徽合肥230031 [2]怀俄明大学大气科学系,美国拉腊米82071

出　　处：《大气与环境光学学报》2011年第1期18-26,共9页Journal of Atmospheric and Environmental Optics

基　　金：科技部基础性研究工作专项重点项目(2007FY110700);国家自然基金(40805014)资助

摘　　要：为了研究合肥上空对流层大气气溶胶的光学特性,研制了一台Raman-Mie激光雷达,用来测量大气气溶胶的消光系数、后向散射系数和激光雷达比的垂直分布。介绍了研制的Raman-Mie激光雷达系统和数据处理方法,并且给出了几个测量结果。在冷锋过境时,激光雷达测量的整层对流层中大气气溶胶的后向散射系数的时空变化表明,大量的气溶胶粒子被冷空气输送到合肥上空,大气气溶胶在4 km以下的垂直分布有剧烈的变化,混合层顶的高度被抬升到了3 km附近。Fernald方法和Raman方法反演的大气气溶胶光学特性的对比结果表明,该激光雷达能够测量合肥上空大气气溶胶层中的消光系数、后向散射系数和激光雷达比廓线。In order to investigate the tropospheric aerosol optical properties over Hefei, a combined Raman elastic-backscatter lidar was developed for vertical,profiling aerosol extinction, backscatter and lidar ratio. The lidar and data processing were introduced, and some measurements were presented. The temporal and vertical variations of the aerosol backscatter coefficient in the troposphere were observed using the lidar during the passage of the cold front, an amount of particles could be taken to Hefei with the cold air mass, the vertical distribution of the aerosol in the lower troposphere varied extremely, and the height of the top of mixing layer could be lifted up to about 3 km above ground level. The comparisons between aerosol optical properties retrieved using Fernald method and Raman method showed that extinction, backscatter and lidar ratio profiles in the lifted aerosol layer cloud be measured using the lidar.

关 键 词：激光雷达 大气气溶胶 消光系数 激光雷达比 

分 类 号：P412.292[天文地球—大气科学及气象学] TN958.98[电子电信—信号与信息处理]