利用不同外尺度模型估算戈壁地区光学湍流廓线的对比研究  

Comparison and Research of Estimating Optical Turbulence Profile Utilizing Different Outer Scale Model in the Gobi Area

作　　者：许文强[1,2] 孙学金[1] 强希文[2] 封双连[2] 

机构地区：[1]解放军理工大学气象海洋学院,江苏南京211101 [2]西北核技术研究所,陕西西安710024

出　　处：《沙漠与绿洲气象》2013年第3期32-35,共4页Desert and Oasis Meteorology

基　　金：国防科技基础研究基金项目

摘　　要：采用新疆戈壁地区3次对比试验数据,分析了Coulman、Dewan、Fried和Lukin 4种外尺度模型对Tatarskii公式估算折射率结构常数(Cn2)的影响。结果表明:温度脉动探空仪实测Cn2数据较Coulman和Dewan模型得到的结果大2个量级,比Fried模型得到的结果小1个量级,在10 km以上的范围,偏差尤为明显。只有Lukin模型得到的结果与实测值最为接近。利用实测Cn2值反算得到了外尺度廓线,整层平均值在38 m左右,比Dewan和Coulman模型得到的外尺度均值大1个量级。The results of calculating refractive index structure constant（Cn2）were given based on Tatarskii formula by using four different outer scale models which proposed respectively by Coulman,Dewan,Fried and Lukin.It showed that Cn2 profile measured by thermosonde were 100 times in magnitude than those calculated using Coulman’s and Dewan’s outer scale model and were merely one tenth in magnitude than those calculated using Fried’s.When the measuring altitude was above 10 km,the Cn2 profile difference was more obvious.The measured Cn2 profiles more likely agreed with those calculated using Lukin’s outer scale model.The outer scale profile was deduced based on Tatarskii formula using measured Cn2 values.It was shown that the mean value of atmospheric outer scale was approximately 38 m which was 10 times in magnitude than those calculated using Dewan’s and Coulman’s outer scale model.

关 键 词：光学湍流廓线 外尺度模型 折射率结构常数 温度脉动探空仪 

分 类 号：P427.1[天文地球—大气科学及气象学]