中国西部典型地区整层光学湍流观测与分析  

Measurement and Analysis of Integral Optical Turbulence at Western Typical Zones in China

作　　者：陈小威[1,2] 李学彬[1] 刘庆[1] 孙刚[1] 张守川[1] 朱文越[1] 翁宁泉[1,3] 

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大气成分与光学重点实验室,安徽合肥230031 [2]中国科学技术大学研究生院科学岛分院,安徽合肥230031 [3]中国科学技术大学环境科学与光电技术学院,安徽合肥230026

出　　处：《光学学报》2016年第8期18-26,共9页Acta Optica Sinica

基　　金：国家自然科学基金(41205023;41375017)

摘　　要：基于大气相干长度和等晕角综合测量系统在中国西部地区的长期测量资料,分析了大气相干长度和等晕角的时间变化和统计分布特征,给出了白天、夜间、傍晚转换时刻三个时段大气相干长度和等晕角的平均值和标准差。对原始数据的概率分布统计表明,不同地区不同月份大气相干长度和等晕角近似满足对数正态分布,并采用样本偏度和样本峰度描述样本分布同正态分布的偏离程度。分析了大气相干长度和等晕角月平均值的相关性,定性评估了不同时段高层湍流和近地湍流对大气相干长度和等晕角的贡献。The temporal and statistical properties of atmospheric coherence length and isoplanatic angle are investigated,based on the long-term measured datum of synthetic measuring system of atmospheric coherence length and isoplanatic angle in the west of China.Meanwhile the mean and standard deviation of atmospheric coherence length and isoplanatic angle in three periods of daytime,nighttime and dusk are given.The probability distributions of initial data show that both atmospheric coherence length and isoplanatic angle are approximately satisfied with lognormal distribution.Besides,the distribution deviation between the sample distribution and log-normal distribution is estimated by sample skewness and sample kurtosis.The correlation between monthly mean of atmospheric coherence length and isoplanatic angle is analyzed,and the effects of the magnitude of upper air and surface turbulence on atmospheric coherence length and isoplanatic angle are evaluated qualitatively.

关 键 词：大气光学 大气相干长度 等晕角 对数正态分布 相关性分析 

分 类 号：P427.1[天文地球—大气科学及气象学]