摘要
利用常规观测资料和多普勒天气雷达资料对2012年7月8日和10日鲁南地区接连出现的2次大暴雨过程进行对比分析,结果表明:低空急流、低空切变线是接连产生暴雨的重要影响系统,在地面风场上体现为中尺度辐合线附近对应强降水中心;强盛发展的低空急流预示着强降水的出现,通过判断低空急流和承载层风向风速可大致估计强回波移动的路径和速度,为预测短时暴雨的持续时间和落区提供依据。相对较高降水效率的强回波持续生成合并并缓慢经过某地,产生暴雨天气;雷达风廓线产品有助于了解暴雨天气的环境场,为预测短时暴雨的雨强变化提供依据。
Based on conventional observation data and the Doppler radar data,the two times of heavy rain in southern Shandong area on July 8 and July 10,2012 were comparative analyzed. The results are as followsLow level jet and shear line is an important system for rainstorm,the center of heavy rainfall are around the mesoscale convergence lines in the surface wind field;Strong development of low level jet implies a strong precipitation,by judging the low-level jet and the bearing layer wind can roughly estimate the strong echo path and velocity of movement,and provides the basis for the duration prediction of short-time rainstorm and falling area. Heavy rain is generated by strong echo higher precipitation efficiency continues to produce slowly after merger;Radar wind profiler products contribute to the understanding of rainstorm weather environment field,provide the basis for the variation of the rain intensity prediction of short-time rainstorm.
出处
《现代农业科技》
2014年第17期257-260,共4页
Modern Agricultural Science and Technology
基金
国家自然科学基金面上项目(41375120)
山东省气象局气象科学技术研究项目(2012sdqxz05)
山东省气象局预报员专项(sdyby2012-13)
临沂市气象局科研项目(2014lyqx08)
关键词
大暴雨
过程分析
雷达特征
对比
鲁南地区
heavy rain
processes analysis
radar characteristics
comparison
southern Shandong area
