深圳X波段双偏振相控阵雷达降水估测算法效果评估  

Effect Evaluation on Radar Quantitative Precipitation Estimation using X-band Polarimetric Radars in Shenzhen

作　　者：余本超 郑佳锋[1] 张扬[2] 刘黎平[2] YU Benchao;ZHENG Jiafeng;ZHANG Yang;LIU Liping(College of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China;State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China)

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225 [2]中国气象科学研究院灾害天气国家重点实验室,北京100081

出　　处：《成都信息工程大学学报》2024年第1期61-71,共11页Journal of Chengdu University of Information Technology

基　　金：国家重点研发计划资助项目(2018 YFC1507401);国家自然科学基金资助项目(L2142210)。

摘　　要：为验证X波段双偏振相控阵雷达的降水估测能力,利用2020年深圳市X波段双偏振相控阵雷达探测资料和广州市S波段双偏振雷达探测资料,建立基于双偏振雷达参量强弱(即ZH、ZDR和KDP)的本地化混合降水反演方法,对不同降水使用最优的雷达参量进行定量降水估测,统计广东龙门县2016年雨滴谱观测资料,得到降水估测公式中的系数,分析不同时间、空间和降水强度下降水个例,利用本地化降水反演方法产生的定量降水估计结果与雨量计观测资料对比。结果表明,高时空分辨率的X波段相控阵雷达可以提高降水估测精度。X波段相控阵雷达在高时间分辨率下,其估测降水强度变化趋势和自动站观测的降水强度变化趋势一致,并且对降水强度小于40 mm/h的降水估测较为准确。在最大观测范围内,X波段相控阵雷达能观测到低层的气象信息,其降水估测的评估结果优于S波段雷达。X波段相控阵雷达对暴雨以下的降水估测更加准确,对暴雨以上的降水估测结果误差较大,可信度不高。In order to verify the precipitation estimation ability of X-band dual-polarized phased array radar,using the Xband dual-polarized phased array radar detection data of Shenzhen in 2020 and the S-band dual-polarized radar detection data of Guangzhou in 2020,a localized hybrid precipitation retrieval method based on the strength of dual-polarized radar parameters(ZH,ZDR and KDP)is proposed,and the optimal radar parameters are used for quantitative precipitation estimation of different precipitation.Using the raindrop spectrum observation data of Longmen County,Guangdong in2016,the coefficients in the precipitation estimation formula are statistically obtained.The precipitation cases under different time,space and precipitation intensity are analyzed,and the quantitative precipitation estimation results generated by the local precipitation inversion method are compared with the rainfall gauge observation data.The results show that the X-band phased array radar with high spatial and temporal resolution can improve the accuracy of precipitation estimation.At high time resolution,the change trend of precipitation intensity estimated by X-band phased array radar is consistent with that observed by automatic station,and the precipitation estimation with precipitation intensity less than40 mm/h is more accurate.In observation range,the X-band phased array radar can observe the meteorological information in the lower layer,and its precipitation estimation results are better than the S-band radar.The X-band phased array radar is more accurate in estimating the precipitation below rainstorm,but it has a large error in estimating the precipitation above rainstorm so the reliability is not high.

关 键 词：X波段相控阵雷达 S波段双偏振雷达 定量降水估测 

分 类 号：P463.1[天文地球—大气科学及气象学]