春季一次典型强对流单体降雹雷达产品特征分析

A TYPICAL SPRING CAME HAIL RADAR PRODUCTS SHOW MONOMER FEATURE ANALYSIS

利用文山新一代天气雷达回波资料及PUP提供的雷达产品对2008年4月12日下午发生在文山州东北部的强对流降雹过程进行分析。结果表明:此次强对流风暴表现为一带状单体强降雹回波分裂为2条EN-W S向带状强对流回波带。在两条带状回波沿雷达径向的伸展方向又有多个强对流回波单体的生成发展。在强对流发展旺盛阶段一直有风向辐合和逆风区伴随。最大回波强度达61.2 dB z,≥50 dB z的强回波高度,最高≥10 km,回波垂直伸展高度大于13 km,最高≥16 km。在强对流风暴发展旺盛阶段,相应的垂直液态水含量和密度分别超过50kg/m2和10 kg/m2,最大达55 kg/m2。强降雹过程具有非常典型的冰雹云回波特征:"V"型缺口、回波悬垂结构、回波墙及有界弱回波区非常明显。

Using the new generation of wenshan weather radar data and provide products to the radar PUP on April 12, 2008, Occurred in the northeast of wenshan afternoon show came hail process were analyzed. Results show that： The strong convective storm performance for a ribbon monomer dropped hailstones echo divided into 2 EN - WS to show with ribbon echo. In two bands of radar echo along the radial direction and more intense con- vective stretch of monomers. Echo In the development of vigorous stage show has been wind convergent zone a- long with wind and. Maximum intensity of 61.2 dBz, 50dBz experiment, it strong echo height, the highest acuity lOkm, echo vertical height, the highest 13kin greater stretch 16km acuity. In intense convective storms, and the corresponding development of vigorous stage liquid density and vertical content than 50kg/square meters and 10kg/square meters, the biggest of 55kg/square meters. Dropped hailstones process is very typical of the hailstorm echo characteristics： ＂V＂ type gap, Echo trailer structure, echo wall and weak echo region bounded very clearly.