银川上空大气气溶胶光学特性激光雷达探测研究  

Lidar Observations of Atmospheric Aerosol Optical Properties over Yinchuan Area

作　　者：毛建东[1,2] 华灯鑫[2] 何廷尧[2] 王鸣[2] 

机构地区：[1]北方民族大学电气信息工程学院,宁夏银川750021 [2]西安理工大学机械与精密仪器工程学院,陕西西安710048

出　　处：《光谱学与光谱分析》2010年第7期2006-2010,共5页Spectroscopy and Spectral Analysis

基　　金：宁夏高等学校科学研究项目(2007JY006);国家自然科学基金项目(40675015)资助

摘　　要：小型米散射激光雷达是广泛使用的探测大气气溶胶光学特性的有效工具。作者研制了一台小型米散射激光雷达,并利用该激光雷达于2009年4月1日至4月10日期间对宁夏银川地区(北纬38°29′,东经106°06′)上空的大气气溶胶光学特性以及时空分布进行了观测。系统选用532 nm波长激光作为光源,采用Fernald法对接收到的大气回波信号进行反演,得到了气溶胶消光系数的高度分布廓线及24 h内气溶胶消光系数相对浓度的时空变化特性;并对期间一次明显的沙尘天气进行了观测和分析。观测结果表明,该小型米散射激光雷达能够对大气气溶胶及其时空分布情况进行有效、连续的观测,其观测结果有利于分析该地区气溶胶及沙尘天气的变化趋势。A compact Mie scattering lidar system has been developed to measure the optical properties and temporal-spatial distribution of atmospheric aerosol particles and some continuous experiments were carried out over Yinchuan area （38°29＇N, 106°06＇E） from 1 to 10 April in 2009 for the first time. The laser located at wavelength of 532 nm was selected as the light source and the Fernald method was used to retrieve the extinction coefficient. The aerosol extinction coefficient profiles and temporalspatial variation properties of aerosol relative density were obtained and analyzed within the whole day at one hour interval, and also an obvious sand-dust-weather process over Yinchuan area was observed and analyzed. The observation results show that the compact Mie scattering lidar is capable of measuring efficiently the optical properties and temporal-spatial distribution of aerosol particles, and the measurement result is useful for studying the variation tendency of atmospheric aerosol and sand weather of Yinehuan area.

关 键 词：银川 激光雷达 沙尘气溶胶 消光系数 

分 类 号：TN958.98[电子电信—信号与信息处理]