| "07.5"湖北大暴雨的中尺度系统及降水成因分析 |
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| 引用本文： | 李世刚,梁涛,彭盼盼,汪高明,胡昌琼."07.5"湖北大暴雨的中尺度系统及降水成因分析[J].湖北气象,2007,26(3):230-235. |
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| 作者姓名： | 李世刚 梁涛 彭盼盼 汪高明 胡昌琼 |
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| 作者单位： | 湖北省荆门市气象局 荆门448000 |
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| 摘 要： | 利用2007年5月30～31日天气图、物理量场、卫星云图和雷达回波资料及常规观测资料,采取天气学诊断分析方法,对湖北省初夏一次暴雨天气过程的大尺度环流特征、中尺度系统和强降水成因进行了分析。结果表明:高层辐散、冷空气与西南暖湿气流交绥、鄂中切变线维持、副热带高压稳定少动,是这次暴雨发生发展的有利大尺度环流背景;强对流云团或西南低涡中尺度云团是造成江汉平原北部、鄂东及鄂西南北部强降水的主要云团;整个暴雨过程伴随着强对流雷达回波的初生、发展、合并和减弱,降水主要由逐渐发展的强回波造成;低空急流输送水汽、中低层层结对流不稳定、低层辐合与高层辐散配置以及暴雨区存在较强锋生作用是此次暴雨的主要降水成因。
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| 关 键 词： | 大暴雨 高低空急流 锋区锋生 对流不稳定 |
| 文章编号： | 1004-9045（2007）03-0230-06 |
| 收稿时间： | 2007-06-29 |
| 修稿时间： | 2007-08-10 |
Analysis of the Hubei Downpour Mesoscale System and the Causality of Precipitation in May, 2007 |
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| LI Shi-gang,LIANG Tao,PENG Pan-pan,WANG Gao-ming,HU Chang-qiong.Analysis of the Hubei Downpour Mesoscale System and the Causality of Precipitation in May, 2007[J].Meteorology Journal of Hubei,2007,26(3):230-235. |
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| Authors: | LI Shi-gang LIANG Tao PENG Pan-pan WANG Gao-ming HU Chang-qiong |
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| Institution: | Jingmen Meteorological Bureau of Hubei Province, Jingmen 448000 |
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| Abstract: | Based on the date weather map, the physical quantity field, the satellite cloud chart, the radar echo data and the conventional observed data on 30~31 May,2007,the large-scale circulation characteristic, the mesoseale system and the strong precipitation origin of the summer rainstorm weather process in Hubei Province have been analyzed by using weather diagnostic analysis method. The result indicates that the high-strata divergence, the cold air with southwest warm and humid airstreams current connection, shear line maintaining the center of Hubei, less stable subtropical high action are the advantageous large-scale circulation background of the rainstorm development. The strong convective clouds or southwest low whirlpool mesoscale clouds cause the main precipitation happening in the north of the Jianghan Plain, the eastern part of Hubei and the north part of southwest Hubei Province; the entire rainstorm process is accompanied by the generating, developing, mergering and reducing of the strong convective radar echoes. The gradual development of strong echoes, low-level convergence and divergence of high-level configuration and the existence of a strong storm zone frontgenesis in the current rainstorm are the main causes of the precipitation. |
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| Keywords: | Heavy rainstorm High and low altitude jet stream Frontal zone frontogenesis Convective instability |
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