摘要
采用重庆地区1999～2008年闪电定位系统监测资料,通过数理统计、回归分析、趋势分析等方法,重点分析重庆地区反映雷电活动规律的闪电频次、雷电流幅值、雷电日等雷电参数时空分布及其变化特征。结果表明:闪电发生在时间分布上存在明显季节性(54%～83%集中在夏季)和日变化特征(主要集中在两个区域:16∶00～18∶00、0∶00～2∶00);在空间分布上,雷电日和闪电频次都呈现出渝西地区较大(其次是渝中和渝东南部,最小的是渝东北部)。正闪雷电流强度明显大于负闪,且冬季各月正闪所占比例与平均雷电流强度均显著高于其它季节,在此基础上获得雷电流幅值频率的累积概率分布公式,为防雷减灾工作提供理论依据。
Based on the monitoring data of lightning location system in Chongqing from 1999 to 2008,the spatial-temporal distribution and variation characteristics of lightning frequency,lighting current amplitude,lightning days and other lightning parameters which reflect lightning activity patterns are mainly analyzed with the mathematical statistics,regression analysis,trend analysis and other methods.The results show that the lightning activity frequency has remarkable seasonal and diurnal variation.54%~80% of seasonal changes concentrate in the summer and diurnal variations mainly concentrate in two time interval of 16∶00~18∶00 and 0∶00~2∶00.Both of lightning frequency and lightning days are higher in west area of Chongqing（the lower one is in the middle and southeast area,and the lowest one is in the northeast area）.The lightning current intensity of positive lighting is obvious higher than that of negative lightning,and the positive lightning proportion and average lightning current intensity are both significant higher every month in winter than that in other seasons.The cumulative probability distribution formula of lightning amplitude frequency is obtained based on all above,which offers the theoretical basis to lightning protection and mitigation work.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2012年第2期242-250,共9页
Resources and Environment in the Yangtze Basin
基金
公益行业专项(GYHY(QX)2007-6-22-4)
国家标准<桥梁工程防雷技术规范>项目
重庆市气象科技项目(闪电定位资料分析与应用)
关键词
重庆
雷电流幅值
特征
累积概率
雷电日
雷电参数
Chongqing
lightning current amplitude
characteristics
cumulative probability
lightning day
lightning parameters
