相对日射资料的谱分析

采用文献［１］所述的相对日射计，将它测量晴天连续日变化资料；用谱的统计方法，来分析研究大气边界层中端涡活动。对１９８０年１月１４和１５日天两资料，用两种取样时段（总记录时间），分别进行谱的统计分析，结论：整个白天（８小时）和２小时内确有不同频率或周期的波动，以低频部分贡献大（２／３总能量），其次高频部分一般为几分钟周期变很明显。因而作者设想把它作为研究大气边界层中湍涡活动的一种探测工具，用它能测得

Spectral Analysis of Insolation

he insolameter recommended in literature 1] was used to measure the data of consecutive luminar variation in clear days,then the data was analysed by spectral statistics to study the activities of the eddies in the boundary layer.The data of the insolametry in Jan. 14th and 15th two clear days was analysed by spectral statistics based on two different kinds of sampling periods(Total recording time),it was concluded that there were fluctuations with different frequency or different period in the whole daytime (eight hours) and two hours period,and the lower frequency partion contributed most to the total energy (almost 2/3),the higher frequency partion also has characteristic period at a few minutes. So the auther assumed the insolameter as a tool to survey the activities of the boundary layer eddies. It can survey the atmosphere media density non-well distributed eddies with horizontal spatial size of 100-1000m. It can also be used in the studies such as the structure of boundry layer eddies,the diffusion of pollutants etc.