摘要
大气折射率结构常数C_n^2是表示大气光学湍流强度的一个重要参数,利用温度脉动探空仪对合肥地区大气折射率结构常数进行了长期连续的实地探空测量,对大量探空实验数据的统计分析得出合肥地区(0～25 km)折射率结构常数随高度的分布廓线,并对其进行统计矩和概率分布的分析,研究表明合肥地区大气湍流随高度分布基本符合对数正态分布,昼夜变化量约为0.8个量级,大气折射率结构常数C_n^2的概率分布存在昼夜差异,白天的C_n^2比夜间的C_n^2峰值要大2个数量级。
The atmospheric structure constant of refractive index Cn^2 is an important parameter of denoting atmospheric turbulence. The Cn^2 is measured both in noonday and at night in everyday at all seasons in Hefei, respectively, using QHTP-2 micro-thermal meter. The vertical profile of Cn^2 in Hefei（0,-25 km）is investigated by analysis of experimental data, and the statistical matrix and statistics distribution is discussed in detail. It＇s shown that variance profile of Cn^2 in Hefei coincide with lognormal distribution, the probability distribution of Cn^2has conspicuous difference day and night.
出处
《大气与环境光学学报》
CAS
2011年第2期83-88,共6页
Journal of Atmospheric and Environmental Optics
基金
科技基础性工作专项重点项目(2007FY110700)资助
关键词
大气湍流
大气折射率结构常数
分布廓线
统计矩
概率
atmospheric turbulence
atmospheric structure constant of refractive index
variance profile
statistical matrix
probability
