摘要
通过对陕西省2003年7月15日区域性暴雨过程进行分析发现,西太平洋副热带高压西侧的暖湿气流和新疆冷空气是这次暴雨的主要影响系统,充沛的水汽输送、能量的积聚和强烈的上升运动为暴雨的发生提供了充分的条件,700hPa和850hPa的低涡、切变线、地面倒槽是暴雨形成的触发机制。数值模拟结果表明:涡度场和散度场互耦;特强散度柱出现早于强涡度柱,而深厚的强气旋性涡柱则几乎与暴雨最强盛时期同时出现。
Based on a torrential rain event occurred on the 15th July 2003 in Shannxi, China,the circumfluence situation , the flow field , vapor condition, dynamic condition and energy were analyzed and simulated. The results show that the MM5 model can successfully simulate the torrential rain, circulation properties and physical factors. Results show also that the occurrence of heavy rainfall had obvious dynamic-thermodynamic structural feature: strong divergence column and intensive vorticity column were coupling developed; the extremely intensive ascendant motion was inter-coupled with saturated air column.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2004年第4期295-299,共5页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
基金
科技部"陕西省干旱遥感监测与突发性暴雨监测预警系统研究"项目(2001DIB20095)
陕西省教育厅重点项目(04JS39)
