距离加权校准法在雷达估测降水中的应用  

Application of Distance Weighting Method to Radar Estimation of Precipitation

作　　者：包嘉敏 佘勇[1] 魏显鉴 Bao Jiamin;She Yong;Wei Xianjian(School of Electronic Engineering,Chengdu University of Information Technology,Chengdu,China)

机构地区：[1]成都信息工程大学电子工程学院,四川成都

出　　处：《科学技术创新》2023年第14期9-12,共4页Scientific and Technological Innovation

摘　　要：利用新疆地区的雷达基数据和自动站数据资料,对两种数据进行数据质量控制,再通过最优ZI法拟合出该地的最优ZI公式,利用美国三种经典降水公式与最优ZI公式反演的降水量与地面雨量计真实测量值进行对比,验证ZI公式对该地区的适用性。最后根据最优ZI公式反演雨量得到雷达估测的雨量初估场,在此基础上利用距离加权法对雷达估测的雨量进行校准,结果表明:校准后的雷达估测降水比起校准后估测降水误差明显减少,说明距离加权校准可以有效的提高降水估算精度,同时能够较为准确的捕捉降水中心,反映整体的降水趋势。Using radar-based data and automatic station data from the Xinjiang,data quality control is performed on both types of data,and then the optimal ZI formula for the area is fitted by the optimal ZI method.The three classical precipitation formulas in the USA are used to compare the inverse precipitation with the optimal ZI formula with the real measured values of ground rain gauges to verify the applicability of the ZI formula to the area.The results show that the error of the calibrated radar rainfall estimation is significantly reduced compared with that of the calibrated rainfall estimation,indicating that the distance-weighted calibration can effectively improve the precipitation estimation accuracy,and at the same time can capture the centre of precipitation more accurately and reflect the overall precipitation trend.The distance-weighted calibration is also able to capture the centre of precipitation more accurately and reflect the overall precipitation trend.

关 键 词：雷达估测降水 Z-I关系 距离加权校准 

分 类 号：P412.13[天文地球—大气科学及气象学]