成都地区近地面大气折射率结构常数的统计分析  

Statistical Analysis of Surface Layer Atmosphere Refractive Index Structure Parameter in Chengdu

作　　者：青春[1,2] 吴晓庆[1] 王海涛[1] 汪平[1,3] 

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026 [3]中国科学院大学,北京100039

出　　处：《大气与环境光学学报》2015年第5期368-375,共8页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金项目(41275020)资助

摘　　要：统计分析了2014年4月至5月期间温度脉动仪和超声风速计测量的成都地区折射率结构常数C_n^2数据。结果显示:无论是白天还是夜晚,两种方法测量C_n^2的结果基本一致。与合肥地区相比,C_n^2的日变化特征明显但转换时刻存在差异。在10^(-15)~10^(-13)m^(-2/3)量级温度脉动仪和超声风速计测量C_n^2的频数分别是74.05%、84.40%;小于10^(-15)的频数分别是24.07%、10.63%;大于10^(-13)的频数分别是1.89%、4.97%。温度脉动仪和超声风速计测量C_n^2的关系为y=-8.5694×10^(-16)+0.6520x,相关系数为99.24%,并简要分析了两种方法测量C_n^2偏差的可能原因。The refractive index structure parameter C~ from April to May in 2014 measured by the temperature pulsating instrument and sonic anemometers in Chengdu was statistically analyzed. The results of C2 measured by two methods agree well with each other both in day and at night.. Compared with Hefei, the diurnal variation of the Cn2 is obvious but conversion time is different. Between 10^-15 and 10^-13 level, C2 frequencies measured by the temperature pulsating instrument and sonic anemometers are 74.05% and 84.40% respectively; the frequencies less than 10^-15 are 24.07% and 10.63% respectively; the frequencies greater than 10^-13 are 1.89% and 4.97% respectively. The relationship of C2 measured by sonic anemometers and temperature pulsating instrument is y = -8,5694× 10^-16 ＋ 0.6520x, the correlation coefficient is 99.24%, and the possible canses of the C2~ deviation measured by two methods was analyzed in brief.

关 键 词：大气湍流 折射率结构常数 超声风速计 温度脉动仪 激光传输 

分 类 号：P427.1[天文地球—大气科学及气象学]