摘要
在前人研究的基础上,提出一种清晰高效的双雷达反射率因子一致性评估算法,对江西省赣州SC型多普勒天气雷达升级双偏振雷达前后的探测性能进行评估。结果表明,赣州雷达完成升级改造后,雷达距离分辨率由1000 m提升至250 m,在50 km处雷达最小可测回波强度由-7 dBZ提升至-10 dBZ,具有晴空探测能力。升级后的赣州雷达无论是在弱降水还是强降水条件下,与吉安和韶关雷达在观测重叠区探测到的反射率因子变化趋势基本一致,但会受到距离及山脉的影响。消除山脉影响后,在观测重叠区赣州雷达反射率因子与吉安雷达反射率因子相关系数为0.93,与韶关雷达反射率因子相关系数达0.96。
This article evaluates the detection performance of the Ganzhou SC Doppler weather radar in Jiangxi Province before and after upgrading to a dual polarization radar,and,based on previous research,proposes a clear and efficient algorithm for evaluating the reflectivity consistency of the two radars.The results show that after completing the upgrade of the Ganzhou radar,the range resolution is increased from 1000 m to 250 m,and the minimum measurable echo intensity detected at 50 km is increased from-7 dBZ to-10 dBZ,indicating its capability of detecting in clear sky.After the Ganzhou radar is updated,it is found that under both light and heavy precipitation conditions,the reflectivity changes detected by the radars in Ganzhou,Ji’an,and Shaoguan are basically consistent,but the reflectivity values can be influenced by distance and mountain ranges.After eliminating the influence of mountain ranges,in the overlapping observation area,the correlation coefficient of reflectivity factors between Ganzhou and Ji’an radars is 0.93,and the correlation coefficient of Ganzhou radar with that of Shaoguan radar is 0.96.
作者
赖晨
程昌玉
黎志波
严婧
高兰
Lai Chen;Cheng Changyu;Li Zhibo;Yan Jing;Gao Lan(Hubei Meteorological Information and Technological Support Center,Wuhan 430074,China;Jiangxi Meteorological Observation Center,Nanchang 330096,China)
出处
《气象与环境科学》
2025年第6期64-73,共10页
Meteorological and Environmental Sciences
基金
湖北省自然科学基金气象创新发展联合基金项目(2023AFD107)
湖北省自然科学基金气象创新发展联合基金项目(2022CFD018)。
关键词
反射率因子一致性
弱降水
强降水
reflectivity consistency
light precipitation
heavy precipitation
