热带气象学报2011，Vol.27Issue(5)：710-716,7.DOI:10.3969/j.issn.1004-4965.2011.05.012
基于ADTD系统的闪电频次分布特征分析
ANALYSIS OF LIGHTNING FREQUENCY DISTRIBUTION CHARACTERISTICS BASED ON ADTD SYSTEM
摘要
Abstract
Lightning frequency is an important parameter to reflect the strength characteristics of lightning activities. This paper focuses on analysis of time distribution characteristics of lightning frequency based on the statistical analysis of ground flash monitoring data by Chongqing ADTD system. Simultaneously, this paper obtains the height property of ground flash point by GIS software and analyzes its space distribution characteristics. The results indicate that the lightning frequency is obviously different associated with different lightning polarities, lightning current amplitudes and gradient; the frequency of lightning current amplitude and gradient is log-normal distribution; the monthly characteristics of lightning frequency are that the positive flashes are dominated from April to July and negative flashes from July to August; the daily characteristics are that the lightning frequency is concentrated in 03:00-07:00 h and 15:00-19:00 h; in the space distribution, the region which has highest frequency is the area 300~500 m above sea level, and then the frequency is decreased with the increase of the height; in the latitude distribution, the high value region is in 28.9～30.3 °N and the second high value region is in 30.7～31.5 °N; in the longitude distribution, the characteristics show double peaks and double valleys(the longitudes of two peak values regions are in 105.9～106.9 °E and inl08.1~109.1 °E); in high amplitude region, the ratio of the positive and negative flashes is higher than that in low amplitude region; the regions which have high lightning frequency are concentrated in northeast, southwest and west Chongqing. Based on above, we obtain the expression of lightning current amplitude and gradient frequency in Chongqing. It offers important theory basis for lightning protection.关键词
ADTD系统/闪电频次/分布特征Key words
ADTD system/ lightning frequency/ distribution characteristic分类
天文与地球科学引用本文复制引用
李家启,申双和,夏佰成,向波,李博,任艳..基于ADTD系统的闪电频次分布特征分析[J].热带气象学报,2011,27(5):710-716,7.基金项目
公益性行业科研专项(GYHY(QX)2007-6-224)资助 （GYHY(QX）
