摘要
利用2012年-2014年PS32雨滴谱仪逐分钟的雨滴谱资料,采用Gamma分布拟合的方法,归纳总结出本地化的Z-I关系,再利用变分法进行校准,获得适用于实际业务需要的本地化Z-I关系。将改进后的Z-I关系应用于本地雷达降水估算和预报,从2012年-2014年年所有降水天气过程中选取12个降水天气过程作为检验样本个例,结果表明:利用雨滴谱仪和雨量自动站资料进行Z-I关系本地化,提高了雷达降水估算中雨量的估算精度,较雷达自带降水估算产品更好地反映了降水的空间分布。
According to the data of automatic laser raindrops spectrometer from 2012 to 2014,the paper,with the Gamma distribution fitting method,sums up the localization of Z-I relationship. By reusing variational method for radar echo,we have automatic rainfall station data points on the calibration. It is suitable for the actual business need localization of Z-I relationship. The improved Z-I is applied to estimate and forecast the precipitation in Langfang city in April 11,2015. The results show that the precipitation estimation accuracy is improved by using rain gauge and rainfall automatic station data,and the spatial distribution of precipitation is better than the original RPG precipitation.
出处
《北华航天工业学院学报》
CAS
2016年第1期33-36,共4页
Journal of North China Institute of Aerospace Engineering
基金
国家自然科学基金(41175086)
河北省气象局科学技术研究项目(14ky26)
廊坊市科技局科技支撑项目(2014013013)
关键词
雨滴谱
Z-I关系
雷达降水估算
效果评估
laser raindrops spectrometer
relation of Z-I
rainfall estimation
effect evaluation
