双波长激光雷达探测典型雾霾气溶胶的光学和吸湿性质  

Two-Wavelength Lidar for Observation of Aerosol Optical and Hygroscopic Properties in Fogand Haze Days

作　　者：伯广宇[1] 刘东[1] 吴德成[1] 王邦新[1] 钟志庆[1] 谢晨波[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大气成分与光学重点实验室,安徽合肥230031

出　　处：《中国激光》2014年第1期207-212,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金青年基金(41205019);国家973计划(2013CB955802)

摘　　要：气溶胶的光学和吸湿性质信息对研究雾霾形成的机制至关重要。为了在环境相对湿度背景下研究利用激光雷达方法探测雾霾气溶胶光学和吸湿性质,选择合肥地区两次典型雾霾过程作为个例,利用水平探测的双波长激光雷达获取气溶胶消光系数、能见度、Angstrom波长指数以及消光系数吸湿增长因子。个例研究结果表明,在环境相对湿度变化的背景下,激光雷达可以有效地获取雾霾气溶胶光学参数以及吸湿增长因子随相对湿度的变化规律,且具有探测开放大气和不扰动被测大气的技术优势。Informations about the optical and hygroscopic properties are important tor understanamg me naze formation mechanism. In order to detect the optical properties and hygroscopic behavior of atmospheric aerosol in fog and haze days under the background of environmental relative in Hefei area are studied as examples, and aerosol extinction humidity change, two cases of typical fog and haze days coefficient, visibility, the Angstrom wavelength index and extinction coefficient hygroscopic growth factor are obtained by using horizontal detection of dual-wavelength lidar. Case study results show that the lidar, with the advantage of detecting unperturbed and ambient atmospheric conditions, can effectively gain the change rule of fog aerosol optical parameters of the hygroscopic absorption and growth factor varying with relative humidity.

关 键 词：遥感 激光雷达 雾霾 气溶胶 光学性质 吸湿增长因子 

分 类 号：TN958.98[电子电信—信号与信息处理]