摘要
利用高空实测资料,采用天气学与动力学方法计算高空大气的物理量参数,结合FY-2数字化云图及多普勒数字化雷达资料,对2004年8月19日发生在宁夏一次区域性大到暴雨过程进行了较细致地分析研究,探讨了宁夏大降水过程中水汽条件、动力条件、热力条件等因子时空分布特征及其重要作用,并指出了本次强降水是在有利的大尺度环流背景下,由多种尺度的系统相互作用及恰当配置的结果,中尺度系统对局地暴雨的形成扮演了重要角色。
Based on routine observational data, several physical parameters calculated using the principle of meteorology and atmospheric dynamics, as well as FY-2 digital satellite image and digital Doppler radar data, the cause and mechanism of a regional heavy to torrential rain process in Ningxia occurred on August 19, 2004 were analyzed in detail. The spatial and temporal characteristics of the vapour, dynamic and thermodynamic conditions and their importance were discussed. Results show that the rainstorm occurred under the condition of the large-scale circulation system, as a result of multi-scale weather systems interacting and standing in a suitable situation, and meso-scale systems play an important role in the local rainstorms.
出处
《干旱气象》
2005年第2期24-29,共6页
Journal of Arid Meteorology
基金
宁夏科技攻关项目"我区天气异常与突变规律的诊断及监测预警技术"
"713c天气雷达在宁夏大面积定量测量降水中的应用研究"共同资助
关键词
暴雨
诊断
中尺度分析
rainstorms
diagnosis
mesoscale analysis
