CAJ | 학술논문

提应用天水多普勒雷达资料，分析了2013年6月19—20日甘肃陇东南地区大暴雨过程中暖区降水时段的雷达反射率因子、径向速度及 PUP 产品特征。结果表明，雷达反射率因子特征与我国东部、南部的暖区暴雨特征极为相似，局地强回波的列车效应明显，强回波一般低于45 dBz，且主要分布于0℃层以下；雷达径向速度反映出对流层中低层的暖平流、风场辐合结构和低空急流的维持有利于强回波及高频次列车效应的产生；γ中尺度涡旋的出现对强降水的临近预报具有明显的指示意义。
제응용천수다보륵뢰체자료，분석료2013년6월19—20일감숙롱동남지구대폭우과정중난구강수시단적뢰체반사솔인자、경향속도급 PUP 산품특정。결과표명，뢰체반사솔인자특정여아국동부、남부적난구폭우특정겁위상사，국지강회파적열차효응명현，강회파일반저우45 dBz，차주요분포우0℃층이하；뢰체경향속도반영출대류층중저층적난평류、풍장복합결구화저공급류적유지유리우강회파급고빈차열차효응적산생；γ중척도와선적출현대강강수적림근예보구유명현적지시의의。
Based on Tianshui Doppler radar data,characteristics of radar reflectivity,Doppler velocity and PUP products during a warm area rainstorm in Southeastern Gansu Province in 19-20 June 2013 are ana-lyzed.The results show that the characteristics of radar reflectivity are extremely similar with the charac-teristic of warm-area torrential rains in eastern and southern China.The “train effect”of local strong echo is obvious.Strong echoes are generally lower than 45 dBz,and mainly distribute in below 0℃ layer.It was advantageous to the generation of strong echo and high-frequency “train effect”that warm advection and wind convergence structure in boundary layer to middle-lower level,low-level jet maintaining showed on Doppler velocity characteristics.The meso-γscale vortex has indicative significance for the nowcasting of severe precipitation.