气象Issue(2)：160-170,11.DOI:10.7519/j.issn.1000-0526.2015.02.004
2009-2012年中国闪电分布特征分析
Analysis of the 2009-2012 Lightning Distribution Characteristics in China
摘要
Abstract
Using the cloud-to-ground lightning data from 2009 to 2012 probed by ADTD Lightning Location Monitoring System,we analyze the spatio-temporal distribution characteristics of flashes.The results show that:the negative lightning flashes are over 94% of the total,but the positive lightning accounts for about 5%.Lightning is prone to occur from May to September,most frequently seen in July and August, which is correspondent to rainfall belts.With the advance of monsoons,lightning flashes gradually in-crease from south to north and from east to west.Summer has lightnings the most,followed by spring and autumn,and in winter almost none.The diurnal distributions of lightnings show the single-peak character-istic,and most of them occur in 16:00-17:00 BT,corresponding to the time periods of severe convective weather events.The overall distribution of lightning is that there are more in Eastern coast and the South than in western inland and the North.The lightning density distribution has obvious regional differences.The central and eastern regions,South China and the Sichuan Basin are the high lightning density area. The daytime lightning mainly occurs in the coastal areas of Jiangsu,Zhejiang and Guangdong while the night lightning usually appears in inland areas of Yunnan,Sichuan and Chongqing.The lightning in the af-ternoon (14:00-20:00 BT)is most active,but less active from 08:00 to 14:00 BT.The lightning high value areas in different regions appear in different months.The high lightning value of South China is in June,Sichuan Basin in July and the central and eastern parts in August.Spring lightning of southern Chi-na is most active,which is closely related to the pre-rainy season in the region.The positive and negative lightning intensity is mainly concentrated in the 10 to 40 kA.The positive and negative ground lightning intensities with cumulative probability of more than 60% are less than 60 kA,35 kA respectively.The positive and negative lightning intensities with cumulative probability of more than 90% are less than 140 kA,65 kA respectively.Lightning intensity low value areas mainly distribute in negative lightnings while the high value areas often appear in positive lightnings.关键词
闪电活动/时空分布/闪电密度/闪电强度Key words
lightning activities/spatio-temporal distribution/lightning density/lightning intensity分类
天文与地球科学引用本文复制引用
王娟,谌芸..2009-2012年中国闪电分布特征分析[J].气象,2015,(2):160-170,11.基金项目
国家自然科学基金项目（41175048）和公益性行业（气象）科研专项（GYHY201006005和GYHY201206004）共同资助 （）
