用常规气象参数估算光学湍流廓线方法的比较
Methods comparision of estimating optical turbulence profile using conventional meteorology parameters
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摘要: 采用美国SPARC数据中心提供的高分辨率无线电探空数据，运用Tatarski公式，对由外尺度或湍流能量耗散率结合常规气象参数估算的折射率结构常数结果进行了比较，间接证明了Sterenborg将外尺度选取1 m时的合理性。并比较了Coulman和Dewan两个外尺度经验公式估算的折射率结构常数。对比分析表明：利用外尺度或湍流能量耗散，结合常规气象参数，都能够估算出折射率结构常数。因湍流能量耗散率观测十分困难，该方法的合理性和代表性需待实验检验。Coulman的外尺度公式只是简单的经验公式，其普适性也需实验检验。而Dewan的外尺度公式中含有实测风速参数，由对流层和平流层不同区域的外尺度公式估算的折射率结构常数相对合理。Abstract: Using high resolution radiosonde data from SPARC data center of America, employing the Tatarski formula, this paper compares the refractive index structure constant calculated by the outer scale method with the one by thd method of coupling turbulent energy dissipation rate with conventional meteorology parameters. It proves indirectly the reasonableness of Sterenborg’s chosing 1 m as the outer scale. Besides, it compares the refractive index structure constant with two different empirical formulas of outer scale from Coulman and Dewan. The analysis indicates that the two methods can both estimate the refractive index structure constant. As the observation of turbulent dissipate rate is very difficult, the reasonableness and the representativeness of the analytic expression need testing b
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