利用测温声雷达回波图估算大气扩散的一种参数化方法

A NEW APPROACH TO ESTIMATE ATMOSPHERIC DIFFUSION COEFFICIENTS BY USING ACOUSTIC RADAR

中文关键词:  声雷达  扩散参数  参数化  对流热羽高度

英文关键词:Acoustic radar  Diffusion coefficient  Parameterization  Convective thermal plume height

中文摘要:

      本文提出了一种基于湍流扩散统计理论的利用声雷达回波图估算大气扩散参数的新方法。这种新方法,仅需要从声雷达回波图上读出边界层结构的信息并取得常规地面测风资料,即可利用参数化公式进行计算,不需进行Pasquill稳定度分类。所应用的参数化公式用外场观测资料进行了检验,表明公式计算结果与观测值比较符合。这种方法计算得到的扩散参数也与P-G扩散曲线进行了比较。

英文摘要:

      In this paper a parameterized method based on turbulent statistical theory is proposed to estimate atmospheric diffusion coefficients from sounder facsimile chart.Using this method,only atmospheric boundary layer structure information is needed which can be obtained from acoustic radar facsimile and routine observed wind data at IOm.Pasquill atmospheric stability categories are not necessary.The parameterized formula in this method is examed is examed by use of field observed data,it is showed that the computed results of this formula are correspondent with observations.The calculated results of this new method are also compared with P-G diffusion curves.