文档介绍：针对甘肃省内的暴雨天气的分析
摘要:近几年来甘肃省内连年经常发生特大暴雨的天气,这对这些暴雨天气的过程进行分析,结果表明,在500hpa高空身后冷槽东移出宁夏,并在甘肃的西部和内蒙阿拉善交接存在以横槽,当横槽东移南压转竖,移动较快,带动冷空气迅速的南下时,为甘肃省的对流天气及冰雹的产生提供了有利的条件。暴雨天气的产生在西北干冷空气与低空暖湿气流的辐合区内,由于地空气急流的作用,大量的水汽不断输送至暴雨区,入侵冷空气触发了对流不稳定能量的释放造成暴雨天气。
关键词:暴雨低空急流分析天气过程
In view of the Gansu province rainstorm weather analysis
Abstract:In recent years Gansu province has frequent rainstorm weather, which of these rainstorm weather process analysis, the results show that, in the 500hPa altitude behind cold trough moving out of Ningxia, and in the west of Gansu and Inner Mongolia Alashan handover presence with a transverse groove, when the transverse slot eastwards and southwards to vertical, moving quickly, drive cold air rapidly in the south, Gansu province for the convective weather hail and have provided favorable conditions. Rainstorm weather in northwest dry and cold air with low altitude warm wet airflow convergence zone, due to the air jet effect, large amounts of water vapor is continuously fed to the torrential rain region, invasion of cold air to trigger a convective instability energy release caused by rainstorm weather.
Keywords: Heavy rain Low altitude Rapids Analysis Weather process
一、天气过程的概述
自从1998年以来,甘肃省陇东地区和宁夏回族自治区出现了暴雨天气,到2010年中卫市出现雷阵雨天气,除少数部分地区外,全市大部分地区都均出现了雷阵雨天气。近年来甘肃省内不少的县市镇村庄都受到了不同程度的暴雨的袭击,造成了几万人受灾,几千户房屋被毁,农作物受灾面积达到了上万公顷,对农业的发展,政府政策的落实都产生了不少的阻碍。特别是舟曲特大洪灾的爆发对建筑的毁灭、良田的淹没