Reliability of X-band Dual-polarization Phased Array Radars Through Comparison with an S-band Dual-polarization Doppler Radar  

作　　者：ZHOU Xin-yu HU Dong-ming ZHANG Yu LI Hao-wen TIAN Cong-cong 周芯玉;胡东明;张羽;李浩文;田聪聪(Guangzhou Meteorological Observatory,China Meteorological Administration,Guangzhou 511430 China;Guangdong Meteorological Observatory,China Meteorological Administration,Guangzhou 510080 China)

机构地区：[1]Guangzhou Meteorological Observatory,China Meteorological Administration,Guangzhou 511430 China [2]Guangdong Meteorological Observatory,China Meteorological Administration,Guangzhou 510080 China

出　　处：《Journal of Tropical Meteorology》2022年第2期218-236,共19页热带气象学报（英文版）

基　　金：Guangdong Basic and Applied Basic Research Foundation(2020A1515010602);Special Fund of China Meteorological Administration for Innovation and Development(CXFZ2022J063);Special Fund for Forecasters of China Meteorological Administration(CMAYBY2019-082);Science and Technology Planning Program of Guangzhou(201903010101);Key-Area Research and Development Program of Guangdong Province(2020B1111200001);National Natural Science Foundation of China(42075190,41875182);Radar Application and Shortterm Severe-weather Predictions and Warnings Technology Program(GRMCTD202002)。

摘　　要：Based on the observations of a squall line on 11 May 2020 and stratiform precipitation on 6 June 2020 from two X-band dual-polarization phased array weather radars(DP-PAWRs)and an S-band dual-polarization Doppler weather radar(CINRAD/SA-D),the data reliability of DP-PAWR and its ability to detect the fine structures of mesoscale weather systems were assessed.After location matching,the observations of DP-PAWR and CINRAD/SA-D were compared in terms of reflectivity(Z_(H)),radial velocity(V),differential reflectivity(Z_(DR)),and specific differential phase(K_(DP)).The results showed that:(1)DP-PAWR has better ability to detect mesoscale weather systems than CINRAD/SAD;the multi-elevation-angles scanning of the RHI mode enables DP-PAWR to obtain a wider detection range in the vertical direction.(2)DP-PAWR’s Z_(H)and V structures are acceptable,while its sensitivity is worse than that of CINRAD/SA-D.The Z H suffers from attenuation and the Z_(H)area distribution is distorted around strong rainfall regions.(3)DP-PAWR’s Z_(DR)is close to a normal distribution but slightly smaller than that of CINRAD/SA-D.The K_(DP)products of DP-PAWR have much higher sensitivity,showing a better indication of precipitation.(4)DP-PAWR is capable of revealing a detailed and complete structure of the evolution of the whole storm and the characteristics of particle phase variations during the process of triggering and enhancement of a small cell in the front of a squall line,as well as the merging of the cell with the squall line,which cannot be observed by CINRAD/SA-D.With its fast volume scan feature and dual-polarization detection capability,DP-PAWR shows great potential in further understanding the development and evolution mechanisms of meso-γ-scale and microscale weather systems.

关 键 词：comparative observations mesoscale weather systems fine structure X-band dual-polarization phased array radar S-band dual-polarization Doppler radar 

分 类 号：P406[天文地球—大气科学及气象学]