基于雨滴谱仪和S波段雷达的X波段相控阵雷达反射率观测质量定量分析  

Quantitative Analysis of Reflectivity Quality of X-Band Phased-Array Radar Based on Disdrometer and S-Band Radar

作　　者：张哲 罗红艳[1] 戚友存 黎慧琦 罗鸣[1] 朱自伟 ZHANG Zhe;LUO Hongyan;QI Youcun;LI Huiqi;LUO Ming;ZHU Ziwei(Shenzhen National Climate Observatory,Shenzhen 518040;Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101;University of Chinese Academy of Sciences,Beijing 100864;Guangzhou Institute of Tropical and Marine Meteorology,CMA,Guangzhou 510640)

机构地区：[1]深圳市国家气候观象台,深圳518040 [2]中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室,北京100101 [3]中国科学院大学,北京100864 [4]中国气象局广州热带海洋气象研究所,广州510640

出　　处：《气象》2024年第10期1187-1200,共14页Meteorological Monthly

基　　金：广东省对接国家重大科技项目(广东省重点领域研发计划)(2020B1111200001-09);深圳市科技计划(JCYJ2023080715440002);国家重点研发计划(2022YFC3004101);华南大城市强对流智能观测与快速识别预警试验(SY2022004)共同资助。

摘　　要：使用深圳市求雨坛X波段相控阵雷达数据,与深圳市竹子林雨滴谱仪数据和深圳市求雨坛S波段雷达数据进行了定量对比,分析X波段相控阵雷达反射率的观测质量。结果表明,整体而言X波段相控阵雷达反射率与雨滴谱仪计算得到的反射率及S波段雷达反射率均较为一致,相关系数均超过0.75,相对平均误差接近于0,不存在明显偏差,且在不同强度降水时段表现较为稳定。但X波段雷达反射率在不同强度下偏差情况不一致,小于25 dBz时,X波段相控阵雷达反射率偏强,大于25 dBz时,X波段相控阵雷达反射率偏弱,且偏弱程度随反射率强度增加逐渐加大,在反射率超过50 dBz时,平均偏弱强度可达8~10 dB。The observation quality of reflectivity of Shenzhen Qiuyutan X-Band Phased-Array Radar is quantitatively evaluated by comparing it to Shenzhen Zhuzilin Disdrometer data and Shenzhen Qiuyutan S-Band Radar data.The results suggest that the reflectivity of X-band phased-array radar is highly consistent with the reflectivity retrieved by disdrometer and observed by S-band radar,with correlation coefficients greater than 0.75 and relative mean biases close to 0,which indicates minimal deviation.The X-band phased-array radar also shows stable performance under different rain intensity periods.However,the deviation of reflectivity of X-band phased-array radar is different under different reflectivity intensities.The reflectivity of X-band phased-array radar is positively biased when reflectivity is under 25 dBz,and negatively biased otherwise.As reflectivity intensifies,the degree of the negative bias gradually increases,and the average bias of reflectivity can reach 8-10 dB when reflectivity exceeds 50 dBz.

关 键 词：相控阵雷达 X波段雷达 反射率 质量分析 

分 类 号：P412[天文地球—大气科学及气象学]