激光雷达对一次沙尘天气探测与分析  

Analysis of Lidar Measurements from a Dust Event

作　　者：郭本军[1] 刘莉[1] 黄丹萍[1] 王玲玲[1] 李学立[1] 

机构地区：[1]辽宁省大连市气象局,116001

出　　处：《气象》2008年第5期52-57,I0002,共7页Meteorological Monthly

摘　　要：利用中韩合作沙尘暴监测项目的微脉冲激光雷达(MPL)观测了2005年4月28日影响大连的一次沙尘天气过程。MPL遥感发现影响大连的沙尘气溶胶层位于0～5km的高度,厚度达5km多。通过激光雷达对大气气溶胶探测与分析,得到了一些沙尘过程对流层气溶胶分布的典型结果,并分析和讨论了沙尘过程气溶胶消光系数的垂直分布和演变特征。基本分析表明,本次沙尘过程的外源性特征明显,并且大气层结对气溶胶(沙尘)的扩散、沉降起着重要作用。A typical dust event that passed over Dalian （121.63°E,38.90°N） on Apr. 28, 2005 has been observed by a micro-pulse Lidar （MPL） in the framework of China-Korea Dust Monitoring Program. It is found that the dust layer located in 0- 5km above the ground level is more than 5km in geometrical depth. Some typical extinction coefficients of atmospheric aerosol distribution were obtained by analysis of Lidar measurements from this dust event. Vertical distribution and developing characteristic of aerosol extinction coefficient were analyzed and discussed in this sand-dust process. This study shows that this dust air mass was transported to Dalian at long distance. The stable atmospheric stratification plays an important role in the diffuse and fallout of aerosol

关 键 词：激光雷达 气溶胶 沙尘 消光系数 

分 类 号：P414.4[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]