河西走廊东部雷电分析与灾害防御  

Analysis on Thunderstorm and Its Disaster Prevention in the East Hexi Corridor

作　　者：杨永龙[1] 钱莉[1] 王生元 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省(中国气象局)干旱气候变化与减灾重点(开放)实验室,甘肃兰州730020 [2]甘肃省武威市气象局,甘肃武威733000

出　　处：《干旱区研究》2008年第5期711-715,共5页Arid Zone Research

基　　金：西部开发科技行动重大项目"祁连山空中云水资源开发利用研究"(2004BA901A16-01子专题)

摘　　要：利用近年的雷达监测资料和河西走廊东部5站点近45年的雷暴资料，分析了区域内雷电的时空变化特征和雷暴在区域内的移动路径。结果表明：雷暴日数的年际变化总体呈减少趋势，雷暴发生时段主要集中在6～8月，占雷暴总日数的76％；雷暴的分布山川多于平原，从南向北逐渐递减，SW方位为雷暴集中发生的方位。影响区域的雷暴主要从祁连山区通过3个地段移出；同时针对石羊河流域的保护和经济建设，分析雷电灾害的分布，提出防御和减轻雷电灾害的对策，为防雷减灾工作提供科学依据。In this paper, the temporal and spatial distribution and movement routes of thunderstorm in the east Hexi Corridor are analyzed based on the radar-monitoring data and the data observed by five meteorological stations in the east Hexi Corridor in recent 45 years. The results show that the occurring frequency of thunderstorm is generally in a decrease trend, and thunderstorm occurs mainly during the period from June to August and occupies 76% of the total. The occurring frequency of thunderstorm in the mountainous regions is higher than that in the plains, it decreases from the south to the north, and the occurring direction is dominated by SW. There are three routes of thunderstorm movement from the Qilian Mountains. Moreover, the spatial distribution of thunderstorm is analyzed so as to serve the conservation of the Shiyang River Basin and the regional economic construction, and some measures are put forward for preventing and reducing thunderstorm disasters, which can be referred in making decision of thunderstorm prevention and reduction.

关 键 词：雷电灾害 防御对策 时空变化 年际变化 河西走廊 

分 类 号：P446[天文地球—大气科学及气象学]