对河南省安阳市一次强对流天气的多普勒雷达资料的分析

利用濮阳雷达站的新一代多普勒雷达产品,结合高空和地面观测资料,分析了2013年8月11日傍晚出现在豫北地区(安阳)的一次强对流天气过程.结果表明:这次天气以是灾害性大风为主,伴随有雷电和短时强降水,局地还有冰雹出现的强对流天气;此次强对流的主要影响系统有副热带高压、500 hPa低槽、中低层切变线和地面冷锋,低层垂直风切变和较强的层结不稳定有利于弓形回波的产生;反射率因子图显示系统为一个典型的弓形回波带,顶部回波最强,同径向速度图均表现出明显的"V"型缺口;雷达资料分析表明,中尺度涡旋(M)、垂直液态水含量(VIL)和回波顶高度值(ET)对雷雨、冰雹和地面破坏性大风等强对流天气有很好的指示作用.

Analysis on the Doppler Weather Radar Echo of a Convective Weather in Anyang of Henan

A severe weather event showing bow echo characterist in the northern part of Henan at afternoon of 11 Augest 2013 is analyzed with Anyang CINRAD data and the observation data from upper-air and surface. The results show that it is a severe convective weather process with catastrophic gale,rainstorm and local hailstone Subtropical high,500 hPa trough,middle-low-level shear line and surface cold-front formed the primary effective weather system. Low-level vertical wind shear and unstable air were favorable for bow echo occurrence. Reflectivity figure shows the system is a classical bow echo balt which strongest at the top,showing significant“V” type gap as same as the base velocity figure. The analysis of radar data showes that the mesocyclone（M）,vert integrated liquid（VIL） and echo tops（ET） are good indicators of strong convective weather such as hunderstorms,hail and ground destructive winds.