基于组网雨量计的中国气象局天气雷达拼图系统V3.0小时降水产品检验——以广西壮族自治区为例OA

Accurate precipitation monitoring and forecasting are essential for disaster mitigation,water resource management,and addressing global climate challenges.The China Meteorological Administration's upgraded Weather Radar Mosaic System V3.0(CWRMS V3.0)plays a pivotal role in operational precipitation monitoring,yet comprehensive validation of its quantitative precipitation estimation(QPE)products remains limited.Focusing on the Guangxi Zhuang Autonomous Region,this study evaluates the system's 1-hour QPE products from 1 January to 31 December,2023,using rain gauge observations from national meteorological stations.The results reveal three key findings:(1)The annual precipitation spatial distribution derived from QPE generally aligns with observations but exhibits distinct regional biases,including overestimation of approximately 500 mm in the coastal areas of the Beibu Gulf and an underestimation around Baise City.(2)The hourly QPE products demonstrate that the system has robust detection capabilities across various precipitation intensities,correlating well with the rain gauge records.However,while performance is satisfactory for light rains,the system exhibits a pronounced negative bias for heavy precipitation events.(3)Spatial disparities in accuracy are evident,with notably high errors(relative bias up to 60%)in northeastern Guilin and western Baise,contrasting with relatively lower errors observed in coastal regions.