利用大气边界层内近地面的大气湍流温度时间序列,运用功率谱分析、信息熵分析等方法,分析了大气边界层内近地面的大气湍流特点,并对稳定层和不稳定层的大气湍流进行了对比。结果表明,信息熵和功率谱指数是区别稳定层结和不稳定层结大气边界层湍流特征的指标,对造成两者之间的差别做出了对应的解释。

The turbulent temperature time series in the atmospheric boundary layer close to ground surface are applied to analyze the characteristics of turbulence in this paper. And comparison between stable stratification and unstable stratification is shown with the method of power spectrum analysis and information entropy analyses. It is found that the information entropy and exponent of power spectrum are two powerful indexes to distinguish the atmospheric turbulence in boundary layer and the explanation for difference between stable and unstable stratifications is presented.