一次冰雹风暴的CINRAD/SA产品分析

STUDY OF CINRAD/SA PRODUCTS FOR A HAIL STORM

分析了 2 0 0 2年 9月 2 7日发生在山东东阿附近一次冰雹风暴发生、发展各阶段新一代天气雷达CINRAD/SA反射率、平均径向速度等产品的演变过程。在风暴中 ,观测到了低层前侧入流缺口、有界弱回波区 (BWER)、中气旋 (M)等超级单体风暴的特征。中气旋在风暴中维持了约 90min ,通过连续时次各仰角高度风暴相对速度产品的分析 ,揭示了中气旋发生、发展和消亡的过程。分析表明风暴跟踪信息 (STI)、冰雹指数 (HI)、垂直积分液态含水量 (VIL)、中气旋 (M)

The products of CINRAD/SA during the course of generation, development and motion of a hail storm which occured near Dong'e county in Shandong province on September 27, 2002 are analyzed. The storm has the characteristics of supercell, such as a “V notch”, a boundary weak echo range(BWER) and a mesocyclone. Mesocyclone exists in the storm for almost 90 min. The speed of relative movement(SRM) in different slice can also display the procedure of the mesocyclone occurring, developing and dying out. The storm tracking information (STI), mesocyclone(M), hail index(HI) and vertical integrated liquid water(VIL) are valuable for identifying and forecasting the hail.