CAJ | 학술논문

利用常规观测资料、自动站加密观测资料、卫星云图和雷达资料，对2012年7月4日山东省西部一次短时强降水的天气形势、物理量条件、云图和雷达回波特征进行分析。结果表明：在有利降水的大尺度天气系统背景下，低层冷空气和中尺度天气系统造成了本次短时强降水天气；低层925 hPa和1000 hPa的充沛水汽和辐合上升运动有利于强降水天气的发生，正涡度中心对应强降水中心；地面辐合线和低压环流造成本次短时强降水天气；中尺度对流云团和地面中尺度系统相对应，其位置和维持时间与强降水的落区和时间基本一致。雷达组合反射率因子＞45 dBZ的强回波区与强降水落区基本吻合；雷达平均径向速度产品逆风区中辐合流场的出现和维持及回波顶高的上升对应地面中尺度气旋式环流的形成和维持；逆风区中辐散流场的出现和维持及回波顶高的下降，对应地面中尺度气旋式环流的减弱；短时强降水出现的初期，垂直累积液态水含量出现了一个峰值，峰值出现时间提前于较强降水时段。
이용상규관측자료、자동참가밀관측자료、위성운도화뢰체자료，대2012년7월4일산동성서부일차단시강강수적천기형세、물리량조건、운도화뢰체회파특정진행분석。결과표명：재유리강수적대척도천기계통배경하，저층랭공기화중척도천기계통조성료본차단시강강수천기；저층925 hPa화1000 hPa적충패수기화복합상승운동유리우강강수천기적발생，정와도중심대응강강수중심；지면복합선화저압배류조성본차단시강강수천기；중척도대류운단화지면중척도계통상대응，기위치화유지시간여강강수적락구화시간기본일치。뢰체조합반사솔인자＞45 dBZ적강회파구여강강수락구기본문합；뢰체평균경향속도산품역풍구중복합류장적출현화유지급회파정고적상승대응지면중척도기선식배류적형성화유지；역풍구중복산류장적출현화유지급회파정고적하강，대응지면중척도기선식배류적감약；단시강강수출현적초기，수직루적액태수함량출현료일개봉치，봉치출현시간제전우교강강수시단。
The paper analyzed the weather situation,physical quantity condition and the characteristics of satellite cloud images and ra-dar echo on July 4 2012 in western Shandong Province by using conventional observation data,intensive observation of automatic weath-er station as well as satellite images and radar data.The results show that this short-term strong precipitation was caused by the lower cold air and the mesoscale weather system under the background of the propitious large-scale weather system.Abundant water vapor and the strong convergence ascending motion on the level of 925 hPa and 1 000 hPa were conducive to the occurrence of strong precipi-tation.The positive vorticity center was corresponding to the strong precipitation center,and the surface convergence line and cyclonic circulation touched off the short-term strong precipitation.The satellite cloud images and radar data revealed the occurrence and de-velopment of the mesoscale weather system.The position and the maintain time of the mesoscale convective cloud cluster were consist-ent with the mesoscale system,and the same as the short-term strong precipitation.Strong radar echo region with composite reflectivi-ty factor more than 45 dBZ corresponded with the area of the short-term strong precipitation.Appearance and maintenance of the con-vergence flow field in radar radial velocity product were associated with the mesoscale cyclonic circulation,as well as the echo top height rising.While appearance and maintenance of the divergence flow field,and decline of the echo top were associated with weake-ning of the mesoscale system.The peak of the vertical accumulated liquid water contend appeared at the early stage of the short-term strong precipitation,and the peak value occurred before the stronger precipitation.