1次沙尘暴天气的消光特性研究  

Extinction character of one sand and dust blowing

作　　者：李学彬[1] 徐青山[1] 魏合理[1] 胡欢陵[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所大气光学研究中心,合肥230031

出　　处：《激光技术》2008年第6期566-567,575,共3页Laser Technology

基　　金：中国科学院知识创新方向性项目资助项目(KGCX2-SW-413)

摘　　要：沙尘暴是一种特殊的自然现象。为了分析沙尘暴对可见光和红外辐射传输产生的影响,利用米散射理论,对北京地区1次沙尘暴天气下沙尘粒子在可见和红外波段的消光进行了计算,并与沙尘暴来临前的测量结果进行了对比分析,得到了沙尘粒子在这些波段的消光特性,并根据激光雷达测量的数据,对沙尘粒子在红外波段的垂直消光廓线进行了反演。这对认识沙尘暴有很大的参考价值。The extinction character of sand and dust particles can cause the attenuation of visible and infrared light transmission. The optical characteristics of sand particle were calculated on the basis of the Mie theory, then the extinction coefficient was compared between sand blowing and normal weathers. The vertical optical characteristic distribution of the sand aerosol at 0. 532um, 1.06um and 10.6um was provided according to the results measured with micro pulse lidar in Beijing. It is valuable for studying sand and dust blowing.

关 键 词：大气与海洋光学 米散射 沙尘暴 消光系数 

分 类 号：P425.55[天文地球—大气科学及气象学]