大气吸收闪烁测量  

Measurements of Absorption Scintillation in the Atmosphere

作　　者：曾宗泳[1] 钟海亮[1] 刘建国[1] 陆亦怀[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室

出　　处：《大气与环境光学学报》2011年第3期203-207,共5页Journal of Atmospheric and Environmental Optics

基　　金：中国科学院知识创新工程重要方向项目(KZCX-YW-411)资助

摘　　要：大孔径闪烁仪(large aperture scintillometer,LAS)的使用,提供了大气近地面层区域平均热通量测量的手段,但区域平均水汽通量的测量还是一个没有解决的重要问题。用LAS测量到的闪烁低频频谱和大气水汽起伏有关,和Nieveen的测量结果不同,在频谱的低端还测量到一个和吸收介质外尺度对应的拐角频率,因此更为合理。不同潜热通量时,折射率的结构常数在满足相似理论的条件下可以计算出来。分析表明LAS测量到的低频闪烁可能还和气溶胶的吸收和散射起伏有关。The means to measure area-averaged flux in the atmospheric surface layer is provided since large aperture scintillometer （LAS） was applied. The measurement technique of water vapor area-averaged flux is an important problem which is not solved so far. The behavior of low frequency range in the scintillation spectrum is probably related to fluctuations of water vapor. The spectra measured by LAS are different from the measurements of Nieveen. Another corner frequency was measured which is related to outer scale of absorb medium, so it is more reasonable. The structure parameter of refractive index imaginary part for the different latent heat flux was calculated by means of simulation theory. Analysis indicates that the low frequency range in the scintillation spectrum is also probably related to absorption and scattering fluctuations of aerosol.

关 键 词：大孔径闪烁仪 吸收闪烁 外尺度 气溶胶起伏 

分 类 号：P427.1[天文地球—大气科学及气象学]