烟台双偏振雷达ROSE2.1降雨产品检验评估

Yantai Dual Polarization Radar ROSE2.1 Rainfall Product Inspection and Evaluation

摘要: 为了改善全国多普勒天气雷达的算法和参数设置，提高雷达数据和输出产品的质量，2022年3月开始中国气象局在全国组织了雷达ROSE2.0及以上PUP产品质量评估工作，各省市气象局成立了专家评估小组开展评估工作，烟台2023年选取降雨量在5 mm∙h⁻¹及以上的14次天气过程进行了评估；评估资料：一体化平台数据图289张，雷达PUP产品OHP图、THP图共380张，micaps形势500 hPa、700 hPa、850 hPa、地面图共274张，三线表OHP、THP评估表共112个，降雨量站点5~20 mm 293个、20~50 mm 216个、50 mm及以上71个，共580个；用统计分析组合对比的方法进行检验评估，发现：OHP准确率较高，THP准确率偏低；OHP和THP错误报的偏大概率偏大；OHP和THP无空报和漏报现象；150 km范围内雷达探测受距离影响和天气系统类型影响不明显；可依据评估结果改善雷达算法或参数设置。

Abstract: In order to improve the algorithm and parameter setting of the national Doppler weather radar and improve the quality of radar data and output products, the China Meteorological Administration has organized the quality assessment of radar ROSE2.0 and above PUP products nationwide since March 2022, and the provincial and municipal meteorological bureaus have set up expert evaluation teams to carry out the assessment. In 2023, Yantai selected 14 weather processes with rainfall of 5 mm∙h⁻¹ or more to evaluate; Evaluation data: There are 289 integrated platform data charts, 380 radar PUP product OHP charts and THP charts, 274 micaps situation 500 hPa, 700 hPa, 850 hPa and ground charts, and 112 three-wire OHP and THP evaluation tables. There were 293 rainfall stations 5~20 mm, 216 rainfall stations 20~50 mm, 71 rainfall stations 50mm and above, a total of 580; It is found that OHP accuracy is higher and THP accuracy is lower. The probability of OHP and THP error is high. OHP and THP have no empty report and missing report. In the range of 150 km, radar detection is not significantly affected by distance and weather system type. The radar algorithm or parameter setting can be improved based on the evaluation results.