2015年闽北一次春季冰雹天气分析

Analysis on a Spring Hail Weather of North Fujian in 2015

利用自动站实时观测数据、常规天气资料、多普勒天气雷达等资料,对闽北一次春季冰雹天气过程进行分析。常规天气资料分析表明,低层西南急流控制下,低空强烈的减压、增温、增湿有利于热力和动力不稳定能量的积聚,加上低层辐合高层辐散,使上升运动增强和维持,从而导致不稳定能量的释放和冰雹等强对流天气的产生;多普勒雷达资料分析表明,此次天气过程为中气旋降雹过程,其组合反射率因子图像上强回波中心的最大值可达65 dBz以上,垂直积分液态含水量(VIL)图像上,降雹前降雹强单体对应的VIL都出现了明显的“跃增”现象,利用多普勒雷达资料可以提高对冰雹等强对流天气的识别能力。

In this article,with the automatic station real time observation data,the conventional weather data,doppler weather radar data,a spring hail weather process in North Fujian were analyzed.Conventional weather data analysis showed that the lowlevel southwest jet control,low intense relief,warming,humidifying was good for heat and power in the accumulation of unstable energy,and lowlevel convergence of highlevel divergence,make the upward movement to enhance and maintain,which lead to the release of unstable energy and the hail and strong convective weather;Doppler radar data analysis showed that the weather process for the cyclone hail process,the combination of maximum reflectivity image in the center of the strong echo could reach more than 65 dBZ,vertical integration of liquid water content(VIL)image,strong before hail reduction monomer corresponding showed obvious VIL"jumped"phenomenon,some identification index using Doppler radar data can improve the recognition of the hail and strong convective weather ability.