泸州X波段双偏振雷达在冰雹识别中的对比应用  

Application of X-Band Dual-Polarization Radar in Hail Recognition in Luzhou

作　　者：李玉婷 周祥华 李晓勇 何兴潼 LI Yuting;ZHOU Xianghua;LI Xiaoyong;HE Xingtong(Luzhou Meteorological Bureau,Luzhou 646000,China;Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China)

机构地区：[1]四川省泸州市气象局,泸州646000 [2]高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072

出　　处：《高原山地气象研究》2022年第S01期114-118,共5页Plateau and Mountain Meteorology Research

基　　金：高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SCQXKJQN2020009)。

摘　　要：利用实况观测资料、714X波段双偏振多普勒雷达和5部拼接的S波段雷达资料,对2020年5月30日泸州一次冰雹过程进行对比分析。结果表明:此次冰雹过程是在200hPa西风急流、850hPa切变、地面辐合线和冷空气的共同作用下发生的。整层大气具有强的不稳定性,存在较强的风切变,各项探空指数也有利于冰雹等强对流天气的发生。冰雹过程中,X波段的回波位置和实际降水、降雹区相匹配,但回波强度偏弱;S波段的回波位置较实况落区偏西,回波强度和实况更匹配。S波段的VIL能够较好地反应冰雹粒子的存在。X波段的R_(HV)能够有效地区分冰雹和强降水回波,而K_(DP)、Z_(DR)存在空洞现象,应用稳定性较差,需结合其它参量进行冰雹识别。A hail process in Luzhou on May 30,2020 was compared and analyzed by using the actual observation data,714X-band dual polarization Doppler radar data and five splicing S-band radar data.The main conclusions are as following:The hail process occurred under the joint action of 200hPa westerly jet,850hPa shear,ground convergence line and cold air.The whole atmosphere has strong in-stability,strong wind shear,and various sounding indexes are also conducive to the occurrence of severe convective weather such as hail.In the process,the echo position of X band matches the actual precipitation and hail area,but the echo intensity is weak.The echo position of S band is wester than the actual area,and the echo intensity matches the actual situation better.S-band VIL can better reflect the pres-ence of hail particles.The X-band RHV can effectively distinguish hail and heavy rainfall echo,while the KDP and ZDR have holes,and the application stability is poor,it is necessary to combine other parameters to identify hail.

关 键 词：冰雹过程 X波段 双偏振 

分 类 号：P49[天文地球—大气科学及气象学]