新疆温宿“6·17”大暴雨多普勒雷达特征分析  

Characteristics of Severe Rainstorm Occurred on the 17th June,2013 in Wen Su of Xinjiang Based on Doppler Radar

作　　者：张继东[1] 张磊[1] 热苏力.阿不拉 张莉[3] ZHANG Jidong;ZHANG Lei;Rasul Abla;ZHANG Li(Akesu Weather Modification Office,Akesu 843000,China;Xinjiang Uygur Autonomous Region Weather Modification Office,Urumqi 830002,China;Akesu Meteorological Observatory,Akesu 843000,China)

机构地区：[1]阿克苏地区人工影响天气办公室,新疆阿克苏843000 [2]新疆维吾尔自治区人工影响天气办公室,新疆乌鲁木齐830002 [3]阿克苏地区气象台,新疆阿克苏843000

出　　处：《沙漠与绿洲气象》2016年第5期10-16,共7页Desert and Oasis Meteorology

基　　金：中国沙漠气象科学研究基金项目(Sqj2015006)资助

摘　　要：应用常规观测资料、阿克苏新一代天气雷达资料，对2013年6月17日新疆塔里木盆地西北缘温宿罕见大暴雨天气过程的环流背景、雷达回波特征进行分析。结果表明：这次罕见大暴雨天气是在有利的天气形势下，由巴尔喀什湖高空槽、中低层和地面的中尺度切变线相配合所致。暴雨由2个典型降雨回波带状系统先后缓慢移经温宿造成，前者回波带走向与带上单体移动方向基本一致，而后者二者之间存在60毅耀90毅夹角，故前者对温宿暴雨作用更大。回波带上对流单体回波反射率因子臆40dBz，云顶高度在7km以下，强回波核位于云体的中下部；暴雨发生前和发生过程中，径向速度中伴随有多个逆风区出现，可作为强降雨监测和临近预报的判据之一；暴雨发生初期，垂直风廓线出现明显的风随高度顺转，且辐合厚度增加，对应深厚的暖平流持续存在，为暴雨发生发展提供了有利的环境场条件。Based on conventional observation and Doppler radar data, the large-scale circulationand radar echo characteristic of a severe rainstorm,which happened during 17th June, 2013 inWenSu of Southern Xinjiang was analyzed. The results showed that the severe rainstorm generatedin favorable weather situations. The Balkhash lake trough, middle -lower layer and groundmesoscale shear line cooperated made the severe rainstorm happen. The rainstorm was caused bytwo typical band-shaped meso-scale systems, which moved repeat along Wensu. The convectioncells move in the same direction with one of the echo-band,the other had an angle of 60耀90. As aresult, the former echo-band played a more important role in the Wensu rainstorm. Reflectivity ofconvection cells is less than or equal to 40 dBz,with top height below 7 km, and center located inlower part of the cloud. Before and during the rainstorm, many adverse wind areas appeared inradial velocity. It may suggest a significant relevance for monitoring and nowcasting in heavyrainfall. When the rainstorm occurred, the vertical wind would clockwise rotation with height, andthe thickness of the convergence zone would increase, which may provide a favorable environmentalconditions for initiation and development of a rainstorm.

关 键 词：大暴雨 多普勒 雷达回波 垂直风切变 

分 类 号：P458.121.21.1[天文地球—大气科学及气象学]