西安理工大学学报2016，Vol.32Issue(3)：309-313,5.DOI:10.19322/j.cnki.issn.1006-4710.2016.03.010
Raman-Mie 激光雷达探测西安地区夏季气溶胶光学特性
Optical properties of aerosols detected by Raman-Mie lidar at Xi’an in summer
摘要
Abstract
The optical properties of aerosols at Xi’an in summer are detected by Raman-Mie lidar, with the spatial-temporal changes of extinction coefficient,backscatter coefficient and lidar ratio under different weather conditions analyzed.Experimental results show that after rainfall the ex-tinction coefficient of aerosols decreases with altitude between 2 km and 5 km,and that when the altitude is greater than 5 km,the extinction coefficient tends to be stable.After rainfall,the ex-tinction coefficient of aerosols at low level is larger than that before rainfall,and the lidar ratio of aerosols above 3 km is smaller than that before rainfall.The possible reasons for the phenomenon are the aerosols deposition and the increase of water vapor density at low level caused by rainfall. Statistical results show that,in sunny and cloud-free days,between 2 km and 3 km,the extinc-tion coefficient and the lidar ratio are all relatively stable,with the extinction coefficient between 0.2 km-1 and 0.3 km-1 ,and the average value of lidar ratio about 50 sr.Between 3 km and 5 km,the extinction coefficient and the lidar ratio decrease with the increasing altitude.Between 5 km and 8 km,the extinction coefficient and the lidar ratio tend to be stable,and the average value of extinction coefficient and lidar ratio are about 0.05 km-1 and 20 sr respectively.So there are still traces of aerosol particles within this range.Finally,the lidar ratio of water cloud is about 17 sr during the experiment.关键词
气溶胶/Raman-Mie 激光雷达/消光系数/雷达比Key words
aerosol/Raman-Mie lidar/extinction coefficient/lidar ratio分类
信息技术与安全科学引用本文复制引用
宋跃辉,鲁雷雷,王玉峰,李仕春,辛文辉,闫庆,刘晶晶,华灯鑫..Raman-Mie 激光雷达探测西安地区夏季气溶胶光学特性[J].西安理工大学学报,2016,32(3):309-313,5.基金项目
国家自然科学基金资助项目 （）
