气象2016，Vol.42Issue(4)：389-397,9.DOI:10.7519/j.issn.1000-0526.2016.04.001
不同类型强对流预报产品的目标对象检验与分析评价
Obj ect-Based Verification and Evaluation for Different Types of Severe Convection Forecasting Products
摘要
Abstract
According to the characteristics of severe convective weather and the requirements to focus on various factors,object-based verification method is developed to find the potential value of forecasts.First of all,convection objects,such as convective cells and severe convective weather area,are identified in both forecasts and observations based on intensity and area which meet certain requirements.Then objects in the two datasets are matched according to the area,distance and morphology.After that,objects in forecasts are verified in five aspects,grade TS score,grade size,distance of center of gravity,cross-corre-lation and morphology (axial and ellipticity).Finally,based on the evaluation preference of users,verifi-cation scores by weighted average and evaluation for area,position and shape are provided.Three types of severe convection forecasting products,such as QPF,REF,or convection probability product of the Chi-nese Meteorological Administration (CMA)SWAN (Severe Weather Analysis and Nowcasting)system, are verified by this object-based method.This method can provide quantitative verification in coincidence and deviation for area,position or intensity.It also can explain why the regular verification scores (such as TS score ) are low. Therefore, this method can privide more effective verification and evaluation information for forecasters,combined with above elements.关键词
强对流/目标对象/检验Key words
severe convection/object/verification分类
天文与地球科学引用本文复制引用
茅懋,戴建华,李佰平,张欣..不同类型强对流预报产品的目标对象检验与分析评价[J].气象,2016,42(4):389-397,9.基金项目
公益性行业（气象）科研专项（GYHY201006002）和上海市科学委员会科研计划项目（14231202400）共同资助 （）
