J4 ›› 2009, Vol. 27 ›› Issue (2): 177-180.

• 论文 • 上一篇    下一篇

雷暴天气的多普勒雷达VWP资料特征分析

吴爱敏1, 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:2009-03-04 修回日期:2009-03-31 出版日期:2009-06-30 发布日期:2009-06-30
  • 作者简介:吴爱敏(1967-),女,河南温县人,高级工程师,主要从事短期天气预报服务和天气气候变化规律研究.E-mai:l qxjwam@ sohu. com
  • 基金资助:

    甘肃省气象局雷达资料的应用与开发项目“新一代天气雷达在强对流天气中的应用”(2006RA-5)资助
      

Analysis on Characteristic ofDoppler Radar VWP Productin Strong ConvectiveW eather Events

WUAimin1, 2
  

  1. (1. Institute ofAridMeteorology, CMA, KeyLaboratory ofArid Climatic Change andReducingDisaster ofGansu Province,KeyOpen Laboratory ofClimatic Change andDisasterReduction ofCMA, Lanzhou730020, China;2.QingyangMeteorologicalBureau ofGansu Province,Qingyang745000,China)
  • Received:2009-03-04 Revised:2009-03-31 Online:2009-06-30 Published:2009-06-30

摘要:

通过对西峰冰雹和强降水的2次强雷暴典型个例的分析,揭示了冰雹和强降水的多普勒雷达VWP资料的前兆特征。结果表明:强对流天气一般在干区(无云区,VWP图中表现为“ND”)基本消失后发生, 2次强对流天气过程的环境低层风切变明显,但冰雹的产生一般出现在风向随高度逆转有冷平流的环境中,而强降水出现在风向随高度顺转暖平流的环境中,并且这种风场的垂直变化特征维持时间长。强对流冰雹暴云西北气流从高层向下扩展到2. 7 km,强降水西南水汽输送达到5. 5 km高度以上,并且伴有低空急流存在。对2006年西峰发生的强对流雷暴天气进行分析,基本都存在风
场的这种垂直分布特征,这一特征对短时临近预报有较好的指示意义。
   

关键词: 冰雹;暴雨, 多普勒雷达, VWP产品分析

Abstract:

The augural characteristic ofDoppler radarVWP productwas revealed by analyzing two typical cases of the hail and the strong rainfall occurred in Xifeng in 2006. The result indicated that the strong convection generally occurred after arid region(no cloud region,“ND”in the figure ofVWP)vanishing, and the wind shearwas obvious in lower level during two strong convective weather processes. The hail appeared in the cold advection environmentwith anti-clockwisewind direction shear, but the strong precipitation appeared in thewarm advection environmentwith clockwise wind direction shear, and this vertical variation ofwind field can keep a long time. The northwest air current expanded from high-level to downward 2. 7 km in hailweather, and the southwest vapor transferred above 5. 5 km in the strong precipitationwith jet stream in the low leve.l This verticaldistribution characteristic ofwind field has good instruction to short-timeweather forecast.

Key words: hai, l rainstorm, Doppler radar, VWP

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