Lightning Distribution Characteristics in Jiangsu

By using the lightning data of 20O provided by Jiangsu Province meteorological department,the lightning characteristics such as monthly variation,daily variation and seasonal variation were analysed,and the result was compared with Oklahoma and Kansas states of America. The result showed that negative ground lightening flash predominated in total CG lightning,accounting for 95.4%.Ground flash mainly appeared in summer,accounting for 92.8%in whole year,and the maximum number of flashes emerged in August,the number was up to 385 817, reached 45.7%in total lightning.The monthly change about the percentage of positive ground lightning was opposite to that of total lightning,the mini-proportion was in summer,the max proportion was in winter.The diurnal change of ground lightning was obvious.The main period of lightning is different in various seasons,and the cause of the formation is different.