Characteristics of cloud-to-ground lightning activity over hubei province, China

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Abstract

The research is based on the 6.8 million cloud-to-ground(CG)lightning data from 2006 to 2012 recorded by the lightning location system(HBLDN: Hubei Lightning Detection Network)which is composed of 12 sensors. The annual lightning intensity, variation of daily and monthly lightning, the distribution of +CG flashes in winter and cumulative probability of lightning current in Hubei province, China are analyzed. The results show that the ratio of negative and + CG flashes is 94.6% and 5.4%, respectively. The peaks of average flashes are in July and August, and the percentage of + CG flashes in winter are higher than other seasons. The distribution of + CG lightning intensity is different in winter from 2006 to 2012 and there is no apparent regularity in the evolution characteristics, and strong + CG flashes mainly occurs at the mountains and plains in the southwest and northwest of Hubei province. The percentage of the +CG flash at 0000–1200 LT is greater than –CG flash and the –CG flash percentage is greater than that of +CG flash at 1300–2100 LT, and the continuous time of diurnal variation is greater than the -CG flash. A probability equation is set up according to the lightning intensity and cumulative frequency, found that less than the 60 kA of lightning intensity is about 94% in Hubei province, and more than 100 kA of +CG flash is showing increasing trend and should be focused on improving the protection and forecasting of +CG flashes.

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APA

Chai, J., & Sun, J. (2019). Characteristics of cloud-to-ground lightning activity over hubei province, China. Weather and Climate Extremes, 24. https://doi.org/10.1016/j.wace.2019.100207

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