摘要
1997年7月28日西安市发生一次强风暴天气过程,分析发现这次过程主要受秦岭山脉地形、地面弱冷空气南下和副高增强西进的共同影响而造成;强风暴发生在地面"人"字形辐合线交点处;由多单体雷暴演变成超级单体雷暴,在雷达回波中呈"S"型。秦岭山脉北侧边缘的对流活动是此类天气前期的一个明显征兆。
A very shortterm severe rainstorm in Xi'an on 28 July 1997 is analyzed and the result shows that this precipitation process is mainly affected by the westward movement of the enhanced subtropical high and the southward movement of the weak cold air mass on the surface. The severe rainstorm took place at the cross of the ground convergence lines and the radar echo presented a typical 'S' shape. The activity of the convection at the northern edge of the Qinling Mountains was an obvious sign of this kind of weather in an earlier stage.
出处
《成都信息工程学院学报》
2003年第1期40-43,共4页
Journal of Chengdu University of Information Technology
