鲁西南地区两次春季低涡暴雨对比分析  

Analysis on the Two Low Vortex Spring Rainstorm in Southwest of Shandong

作　　者：张熙[1] 李媛[1] 张泽铭[1] 郭振华[1] 赵京峰[1] 

机构地区：[1]济宁市气象局,山东济宁272000

出　　处：《湖北农业科学》2017年第4期627-633,共7页Hubei Agricultural Sciences

基　　金：2014年山东省气象局预报员专项(SDYBY2014-04)

摘　　要：通过对比分析了鲁西南地区2013年5月26日和2014年5月10日两次春季低涡暴雨过程。结果表明,冷空气入侵层结的不同、低层强辐合区高度的不同、能量锋区位置的不同以及强上升运动中心位置的不同,都是造成低涡暴雨降水强度差异的重要原因。冷空气侵入层节的异同决定了降水的稳定度;边界层强辐合对于气旋前部偏东气流里的暴雨形成更为重要;低空急流的强弱及位置决定了降水的强度和落区,强降水均发生在能量锋区前沿;强上升运动区的深厚程度也是造成暴雨量级不同的关键因素,同时从暴雨区北侧下沉运动区可以看出冷空气的位置及其势力的强弱。Through comparison on May 26, 2013, and on May 10, 2014, the two spring vortex rainstorm process in south- west Shandong were analysized. The results showed that the difference of layer of cold air invasion, strong low-level conver- gence zone height, energy frontal zone position and strong upward movement center position were the important cause of low vortex rainstorm precipitation intensity difference. The similarities and differences between the invasion of the cold air layer section determined the stability of the precipitation; Boundary layer of strong convergence for the front cyclones by east of rainstorm formation was more important; The strength of the low-level jet and position determined the intensity of rainfall and the drop zone, and the heavy rain had occurred in energy frontal zone front; Strong upward movement in deep level was the key reason for torrential rain level different. At the same time, it could be seen the position of the cold air and the strength of its power from the heavy rain area north of sinking motion area.

关 键 词：春季暴雨 鲁西南 低涡 辐合辐散 

分 类 号：P458.121.1[天文地球—大气科学及气象学]