Result it is the determinant cause leading abnormal climate of Shaanxi during Main-flood Season that Blocked High near Ural Mountain and Balkhash Low are stable in motion and subtropical high is strong.

• 结果:乌拉尔山附近阻塞高亚、巴湖低压这种稳定少动的超长波系统与副高偏强的配置,是形成陕西省2003年主汛期多雨的关键性因素。