大气与环境光学学报, 2011, 6 (2): 83, 网络出版: 2011-03-28
大气折射率结构常数C2n高度分布统计特性分析
Statistical Characteristics of Vertical Distribution of Atmospheric Structure Constant of Refractive Index C2n
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
摘要
大气折射率结构常数C2n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C2n的 概率分布存在昼夜差异,白天的C2n比夜间的C2n峰值要大2个数量级。
Abstract
The atmospheric structure constant of refractive index C2n is an important parameter of denoting atmospheric turbulence. The C2n 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 C2n 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 C2n in Hefei coincide with lognormal distribution, the probability distribution of C2n has conspicuous difference day and night.
孙刚, 翁宁泉, 肖黎明. 大气折射率结构常数C2n高度分布统计特性分析[J]. 大气与环境光学学报, 2011, 6(2): 83. SUN Gang, WENG Ning-quan, XIAO Li-ming. Statistical Characteristics of Vertical Distribution of Atmospheric Structure Constant of Refractive Index C2n[J]. Journal of Atmospheric and Environmental Optics, 2011, 6(2): 83.
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