主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2021, Vol. 37 ›› Issue (4): 107-113.doi: 10.3969/j.issn.1673-503X.2021.04.015

• Articles • Previous Articles     Next Articles

Analysis of characteristics of lightning current amplitude in Liaoning province from 2010 to 2018

Pan CHENG1,2,3(),Yang ZENG2,4,Lei CHENG5,Wen-jing PANG2,*(),Guang-liang XIAO3,Xian-yuan RONG2,6   

  1. 1. Chengdu University of Information Technology, Chengdu 610225, China
    2. CMA Meteorological Observation Center, Beijing 100081, China
    3. Liaoning Meteorological Disaster Monitoring and Early Warning Centre, Shenyang 110166, China
    4. Jiangxi Provincial Atmospheric Observation Technology Centre, Nanchang 330096, China
    5. Dandong Meteorological Service, Dandong 118000, China
    6. Shucheng Meteorological Bureau of Anhui Province, Shucheng 231300, China
  • Received:2020-11-28 Online:2021-08-30 Published:2021-09-10
  • Contact: Wen-jing PANG E-mail:lnqx_chengpan@sina.com;77641231@qq.com

Abstract:

The temporal variation characteristics of lightning current amplitude were analyzed using a statistical method based on the lightning data (ADTD) from 2010 to 2018 in Liaoning province. The cumulative probability densities of lightning current amplitude, calculated using the specification calculation formula and the formula recommended by IEEE, were compared with the real data curve to analyze the error. The formula recommended by IEEE was fitted with the least square method. The results show that the major CG lightning with a proportion of 89% are negative in Liaoning province from 2010 to 2018, and their current amplitudes are mainly concentrated between -50~-20 kA. The frequency of CG lightning increases year by year from 2011 to 2013 and then decreases year by year. The average lightning current amplitudes of total and negative CG lightning decreases from 2010 to 2013 year by year and then increases year by year. The CG lightning mainly occurs in the flood season from July to August, and the average lightning current amplitude is the highest in winter with a stable diurnal variation. The probability density curves of the total and negative CG lightning with the lightning current amplitude between 20-50 kA experience the fastest decrease, while those whose lightning current amplitudes are about 20 kA begin to decline slowly. The cumulative probability density curves of lightning current amplitude fitted with the formula recommended by IEEE are closer to the actual situation now than before.

Key words: Lightning location, Lightning current amplitude, Probability density, Least-squares fitting

CLC Number: