摘要
基于正镶白旗1970—2007年的雷暴资料,对正镶白旗38年雷暴日数的年、季、月的变化特征进行了分析。分析表明:上世纪70年代以来雷暴呈减少趋势,年雷暴持续时期无明显变化;70、80、90年代至本世纪初雷暴逐年代减少;正镶白旗雷暴只发生在春、夏、秋三个季节,冬季无雷暴,季节性明显,夏季雷暴占全年的76%;雷暴的月变化明显,其中7月份雷暴活动最频繁,约占全年的三分之一。针对雷暴的气候变化特征及当今雷灾发生的新特点,对雷暴的防御措施进行初步探讨。
Based on the thunderstorm data of Zhengxiangbai County from 1970 to 2007, analyzed the annual, seasonal and monthly variation characteristics of number of thunderstorm days in 38 years in Zhengxiangbai County. The results showed： number of thunderstorm was decreasing trend since the 1970＇s of last century; decreased year by year in 70% 80% 90＇s and the initial 21 century; the thunderstorm only occurred in spring, summer and autumn, which mainly occurred in summer. It accounted for 7696 of the year. There isn＇t thunderstorm in winter, seasonal changing was obvious; monthly change of thunderstorm was obvious. It was most frequent in July, which is one third of the annual total. Aim at the climate characteristics of thunderstorm and new trait, made a preliminary analysis on the defense measure.
出处
《内蒙古气象》
2009年第3期18-19,共2页
Meteorology Journal of Inner Mongolia
关键词
雷暴
气候特征
分析
防御措施
Thunderstorm
Climate characteristics
Analysis
Defense measure
