Abstract:

Based on the data of Lightning Location System (LLS) from 2002 to 2007 in Suzhou，the spatial and temporal characteristics of cloudtoground lightning (CG) were analyzed.The results show that the lighting activity is more frequent in Suzhou and Zhangjiagang.The CG lightning in Taihu area and Suzhou city have stronger lightning currents.The thunderstorm days in Suzhou change as the normal distribution，and there are the most thunderstorm days in summer in Suzhou.The daily stroke numbers change as the double peak distribution，fewer lightning activity occurs at about 10〖DK〗∶00 am，the most of the CG lightning occur at 02〖DK〗∶00 am and 07〖DK〗∶00 pm，and the peak value of the lightning activity appears at 07〖DK〗∶00 pm.Most mesoscale convective systems (MCS) appear at about 07〖DK〗∶00 pm in summer.Also，the lightning protection in country of Suzhou was analyzed in this paper.It was found that the reasons of lightning disasters include not only the geographical position but also human factors.Two suggestions about country safety were presented，the lightning protection design parameter should be properly chosen and the lighting forecasting should be strengthened.

Key words: Lightning Location System (LLS)/ stroke number/ intensity of lightning current/lightning density/ lightning strike accident