Investigation of seasonal and diurnal cycles on the height dependence of optical turbulence in the lower atmospheric boundary layer
Investigation of seasonal and diurnal cycles on the height dependence of optical turbulence in the lower atmospheric boundary layer
复制标题
低层大气边界层光学湍流高度依赖性的季节和昼夜循环研究
DOI：
10.1117/12.929806
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
E. Sucher
中科院分区：
文献类型：
--
作者：
D. Sprung;P. Grossmann;E. Sucher
在分析可见光和近红外（IR）光波传播时，必须考虑温度变化引起的光学湍流的影响。特别是在低层大气边界层中，大多数光电系统的工作区域都受到大气湍流的影响。研究了热湍流和机械湍流对折射率结构函数参数Cn²高度依赖性的影响。Cn²用于表征光学湍流。主要的重点是设置在季节和昼夜变化。分析了近地层和夜间残留层中依赖于大气稳定度的变化。结果来自长期实验VerTurm（垂直湍流测量）。自2009年6月以来，在德国西北部的农村地区连续进行实验。光学湍流的垂直结构进行了探索，使用三种不同的测量技术，以覆盖的高度范围之间的表面和约250米的高度。模型进行了比较和讨论。
Analysis of wave propagation in the visible and near infrared (IR) has to take into account the influence of optical turbulence due to variations of temperature. Especially the operation area of most electro-optical systems in the lower atmospheric boundary layer is affected by atmospheric turbulence. The influence of thermal and mechanical turbulence on the height dependency of the structure function parameter of the refractive index Cn² is investigated. Cn² is used for the characterization of optical turbulence. The main focus is set on seasonal and diurnal variations. The variations dependent on atmospheric stability in the surface layer and the nocturnal residual layer are analysed. Results are presented from the long-term experiment VerTurm (Vertical Turbulence Measurements). The experiment is continuously performed since June 2009 in rural country at north-western Germany. The vertical structure of optical turbulence is explored using three different measurement techniques to cover the altitude range between the surface and about 250 m height. Model comparisons are carried out and discussed.