摘要
利用NCEP1°×1°再分析资料和雷达资料对发生在邵阳市灵官殿镇一次强冰雹过程进行了分析。结果发现:此次冰雹发生在500hPa短波槽、700 hPa西南急流、850 hPa西南涡环境中。此次冰雹反射率因子回波典型特征就是钩状回波和有界弱回波区;冰雹发生时,高仰角出现旁瓣回波,旁瓣回波的移动方向和强度对冰雹有指示作用;雷达径向速度图上逆风区对强冰雹预报预警具有指示作用。
By using NCEP1°×1° reanalysis data and radar data,the hail process which occurred in Lingguandian Town of Shaoyang City was analyzed.The results indicated that the 500 hPa existed a short wave trough,the 700 hPa existed southwest jet stream,850 hPa existed southwest vortex.The hail occurred in this environment.The typical characteristics of base reflectivity was typical hook echo and BWER.When the hail occurred,the side-lobe echoes existed in the higher elevation.The shifting direction and strength of the side-lobe echoes had petroleum geologic significance.The adverse wind area in the velocity was of indicative for prediction and warning of severe hail weather.
出处
《现代农业科技》
2012年第20期271-274,共4页
Modern Agricultural Science and Technology
