用Z和I确定雨滴在静止大气中的多卜勒速度标准差
投稿时间:1987-08-07  修订日期:1988-01-15  点此下载全文
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作者单位
张培昌  
戴铁丕  
曾春生  
中文摘要:本文提出了一种使用常规测雨雷达测定的雷达反射因子Z及雨量计测定的雨强I,在一定的假设条件下确定静止大气中降水粒子的多卜勒速度标准差σv的方案。用此方案对各类降水的雨滴谱进行了计算,并与在雷莱散射条件下按σv定义式计算的结果相比较,其平均相对误差在15—30%以内。
 
DETERMINATION OF STANDARD DEVIATION OF DOPPLER VELOCITY IN THE STATIC ATMOSPHERE BASED ON Z AND I
Abstract:A new scheme is proposed for determining the standard deviationof Doppler velocity in the static atmosphere based on the radar reflec-tivity factor Z from the conventional weather radar and the rainfallrate I from the ordinary rain gauge. The raindrop size distribution indifferent types of precipitation is calculated by this method. Compari-son is made between the result using this method and that using thedefinition equation under the Rayleigh scattering condition. The averagerelative errors are found within 15-30%.
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