摘要
介绍了使用多普勒天气雷达对濮阳2005年7月22日暴雨天气过程进行连续监测的情况,利用基本反射率、组合反射率和回波顶、垂直积分液态水、基本速度等雷达产品进行分析。结果表明,此次降水回波持续时间较长,有"人"字形回波特征。径向速度产品图上,逆风区与辐合区出现、发展,预示强风暴的出现。速度场的强弱变化早于回波强度变化,可更早得到风暴的发展情况,追踪多普勒径向速度场上的逆风区、辐合区的运动路径,可以大致确定强降水的落区,从而提前预报出灾害性天气。垂直积分液态含水量相对稳定,大值区与强回波区有一定的对应关系。通过分析得出此次暴雨的一些雷达回波特征,可为今后暴雨识别、预报提供参考和依据。
A rainstorm happened in July 22th 2005 in Puyang which was detected by Doppler Radar was introduced.The radar products such as Vertically Integrated Liquid,Composite Reflectivity,Reflectivity,Velocity,Reflectivity Cross Section and Echo Tops etc were analyzed to find out how to use these products to predict the rainstorm.The results showed that liquid water corresponds to the vertical integration of the resolution of crisis,which continued high liquid water and the vertical integration corresponding to the monomer super echo,the use of its characteristics can help identify stronger echo,thereby further identified strong rainstorms such as weather and the possibility of certainty.If the stack and other products will be able to define the location of the rainstorm,the reflection rate and the basic composition of reflectivity,the basic speed combination can be used to determine effective reflectivity echo strong centres,and the strong center,the basic rate of reflection centre-compared to a strong echo of the position,by tracking the Doppler radial velocity field against the wind,the movement convergent paths can be broadly defined heavy rainfall in the district.
出处
《安徽农业科学》
CAS
北大核心
2010年第15期7994-7996,共3页
Journal of Anhui Agricultural Sciences
关键词
多普勒
天气雷达
探测
暴雨
浅析
Doppler
Weather radar
Detection
Rainstorm
Analysis
