合肥春季气溶胶结构层探测研究  

Lidar Observation of Aerosol Layers over Hefei in Spring

作　　者：王珍珠[1] 刘东[1] 钟志庆[1] 谢晨波[1] 范爱媛 戚福弟[1] 王英俭[1] 周军[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

出　　处：《大气与环境光学学报》2011年第1期11-17,共7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)资助

摘　　要：为了分析造成合肥上空春季自由对流层气溶胶浓度分布高于其它季节的原因,本文对偏振激光雷达2005～2008年期间春季常规测量和加密测量的数据结果进行再分析,从中提取了137组气溶胶结构层进行统计研究,并对2008年3月2日的观测结果作了个例分析。结果表明,特殊气溶胶结构层大多源于沙尘源区气溶胶粒子的远距离传输,其影响高度70%分布在2～4 km范围内,退偏振比大于0.1的结构层占据85%,这些结果可用于解释合肥春季自由对流层的气溶胶浓度分布偏高的原因。Aerosol data measured by polarization lidar over Hefei in spring of 2005～2008 are analysed again. The observational results on Mar. 2nd, 2008 are used for case study and 137 samples of aerosol layers are investigated statistically. The results show that 70% of the average heights for these layers is ranged from 2 to 4 km, and the value of depolarization ratio for them, which is lager than 0.1, takes up to 85%, and these aerosol layers are sourced from the dust particles, which are transported in long range from the dust regions. These results can used to interpret why the aerosol concentration in free troposphere over Hefei in spring is higher than other seasons.

关 键 词：激光雷达 气溶胶层 沙尘 退偏振比 后向散射系数 

分 类 号：X831[环境科学与工程—环境工程] P412.25[天文地球—大气科学及气象学]