J4 ›› 2007, Vol. 25 ›› Issue (2): 43-49.

• 论文 • 上一篇    下一篇

庆阳2次强对流天气过程的新一代雷达资料对比分析

吴爱敏1,2薛塬轩2白爱军2张洪芬2   

  1. 1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃兰州730020;2.甘肃省庆阳市气象局甘肃庆阳745000
  • 收稿日期:2006-06-30 修回日期:2006-12-15 出版日期:2007-06-30 发布日期:2007-06-30
  • 作者简介:吴爱敏(1967一),女,河南温县人,高级工程帅,主要从事短期天气预报服务和灭气气候变化规律研究.E—mail:q~jwam@sohu.coi11
  • 基金资助:

    甘肃省气象局雷达资料的应用与开发项目“新·代天气雷达在强对流天气巾的应用”(2006RA一5)资助

Comparative Analysis of Two Strong Covective W eather Processes by New Generation Radar Data in Qingyang

WU Aimin 1,2,XUE Jingxuan 2,BAI Aijun 2,ZHANG Hongfen2   

  1. 1.Institute ofArid Meteorology,CMA,Key Laboratory ofArid Climatic Change and Reducing Disaster ofGansu Prouince,key open laboratory ofArid climatic change and Disaster Reduction ofairs,Lanzhou 730020,China;2.QingyangMeteorologicalBureauof GansuPr~ince,Qingyang 745000,China
  • Received:2006-06-30 Revised:2006-12-15 Online:2007-06-30 Published:2007-06-30

摘要:

通过新一代天气雷达观测,利用基本数据产品和物理量产品,分析了庆阳市2005年5月30日强冰雹过程和7月1~2日连续暴雨过程中雷达回波强度、速度、云顶高度、垂直积分液态含水量的特征,并将2次过程的雷达产品特征进行了对比分析。结果表明:冰雹和连续性暴雨回波反射率因子差异大,冰雹回波发展移动快,达50 km/h,中心强度超过50 dBZ;回波移动前沿梯度大,速度图上出现速度模糊,雷达探测出中气旋,云顶高度超过12 km;降雹前VIL出现跃增,中心超过20 1,g/m 都有降雹。而连续暴雨强度只有25~35 dBZ,移速慢,零速度线分布有规律,能反映低空急流和冷暖气团移动规律,云顶高度低,仅为5~8 km,降水过程中VIL变化小。

关键词: 冰雹, 暴雨, 多普勒雷达产品, 对比分析

Abstract:

Based on the Doppler radar data,the characteristics of the echo intensity,velocity,top height and vertically integrated liq-uid water(VIL)of the strong hail on May 30 and the rainstorm on July 1.’2 in 2005 in Qingyang region were analyzed,and compari-sOn between these two weather events Was carried out.Results show that difierence of the reflectivity between the hail and rainstorm Was great;the hail echo developed and moved quickly at the rate of 50 km/h,and the central intensity of hail echo exceeded 50 dBZ;there Was some speed fuzzy area on velocity map,and middle cyclone Was detected by the radar ;山e t0p of cloud Was more than 12 km;VIL increased suddenly before haifal1.and hail occurred when VIL in central was over 20 ks/m .While the echo intensity of the rainstorm Was only 25—35 dBZ,and rainstorm echo moved slowly;the 0 speed line was regular and it can reflect the low level jet and develop—ment of air mass,and the top height of cloud Was only 5—8 km and VIL changed little during rainfall process.

Key words: hail, rainstorm , Doppler radar product, comparative analysis

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