陕西雷暴灾害及时空分布特征  

The Disaster and Spatial and Temporal Distribution Features of Thunderstorm in Shaanxi

作　　者：李亚丽[1] 杜继稳[2] 鲁渊平[3] 雷向杰[3] 

机构地区：[1]兰州大学大气科学学院,甘肃兰州730000 [2]陕西省气象局,陕西西安710015 [3]陕西省气象台,陕西西安710015

出　　处：《灾害学》2005年第3期99-102,共4页Journal of Catastrophology

基　　金：陕西省科技厅攻关项目(2001K09-G7);陕西省气象局项目(2004M-3)联合资助

摘　　要：利用1971～2000年30年陕西93个气象站的逐日气象观测资料,对陕西雷暴的时间、空间分布特点和变化特征进行了分析,并对其影响进行了论述.分析结果表明:陕西雷暴天气30年来呈减少趋势,雷暴日数关中中部最少,陕北北部府谷最多.雷暴集中发生在5～8月.陕北、关中、陕南雷暴日变化规律基本相同,集中发生在午后14～22时.The spatial and temporal distribution and variation features of thunderstorm in Shaanxi are analyzed based on daily weather datum of 93 observatories of Shaanxi from 1971 to 2000, and its influence is discussed. Results indicate that the thunderstorm days show decreasing trend since 1970, the thunderstorm days in a year are the least in the central part of Shaanxi and the most in Fugu in the north of northern Shaanxi. The thunderstorms occur mainly in May to August. The daily variations of thunderstorm in the north, the central and the south of Shaanxi basically show the same trend. It takes place mainly from 14 to 22 o＇clock.

关 键 词：雷暴 分布特征 影响 陕西 

分 类 号：P446[天文地球—大气科学及气象学]