驻马店市两次强对流天气的多普勒雷达产品特征的对比分析  

The Comparative Analysis on the Doppler Weather Radar Products Characteristics of Two Strong Convective Weather in Zhumadian City

作　　者：赵龙 王芦 高宇田 

机构地区：[1]驻马店市气象局,河南驻马店463000

出　　处：《河南科学》2014年第5期863-866,共4页Henan Science

摘　　要：针对近年来河南省驻马店市出现的强对流天气，用多普勒天气雷达产品如反射率因子、径向速度、垂直液态含水量、风暴跟踪信息等进行普查分析，重点对两次不同性质的强对流天气的雷达产品进行详细研究．发现强对流天气的雷达回波强度在40dBz以上，强度为40～50dBz的回波移速为25～35km／h时，一般出现强降水，无雷暴和大风；回波移速为35～45km／h时开始伴有雷暴和大风的出现；当回波移速达到45～60km／h时，强雷暴和大风的出现几率上升，而强降水的出现几率急剧下降；当回波移速达到60～69km／h时，则以雷雨大风为主，强降水出现很少．冰雹时强回波伴有“V”型缺口，回波强度可达55dBz以上，强回波中心出现在9～12km高度，回波顶可高达15～18km，强回波下方有强上升气流造成的弱回波区．短历时强降水的雷达回波强度比冰雹、雷暴弱，一般为40～50dBz，强回波中心高度5～6km；当回波强度大于50dBz，强回波中心达到8km以上时，往往伴有强雷电和大风冰雹出现；回波形态多呈现絮状混合型回波，其中有块状的强回波，对流性的强降水回波则是边缘清晰的块状结构．In view of the strong convective weather appeared in Zhumadian, Henan Province in recent years, we analysed their Doppler weather radar products such as reflectivity, radial velocity, vertical liquid water content, storm tracking information, etc. Focusing on two different nature strong convective weather radar products, it was detailed researched and found that as follows. Strong convective weather radar echo intensity is more than 40 dBz; For the radar echo of strength of 40-50 dBz, if moving at the speed of 25-35 km/h, it usually has a heavy rain, without the thunderstorm and winds： if the speed is 35-45 km/h, it would begin with the appearance of thunderstorm and gale： When the speed reaches to 45-60 km/h, strong thunderstorms and gale are likely to appear, the presence chance of heavy rains reduces sharply： When the speed reaches to 60-69 km/h, it gives priority to strong thunderstorms and gale, while heavy rain occurs rarely. When large hailstones emerge, the radar echo has V-notch, and its intensity can be more than 55 dBz. When the strong echo centers is in 9-12 km altitude, echo tops can be as high as 15 to 18 km, and under the strong echo there is weak echo region caused by the strong updraft. The radar echo intensity of short duration strong precipitation is weaker than that of the hail and thunderstorm, generally 40-50 dBz, with strong echo center height 5-6 km： radar echo mainly presents the cotton wool shape with massive strong echo, while the strong convection precipitation echo edge is clear block structure.

关 键 词：强对流天气 多普勒天气雷达产品 冰雹 短历时强降水 

分 类 号：P548.2[天文地球—构造地质学]