2010—2021年辽宁省雷电分布及其与海拔高度的关系

doi:10.3969/j.issn.1673-503X.2023.04.017

Abstract

Abstract:

Lightning distribution characteristics in Liaoning province such as intensity, density and lightning current amplitude, and their relationship with the altitude were analyzed using the lightning location data in Liaoning province from 2010 to 2021, combined with space natural breakpoint classification method.The results show that the amplitude distribution of lightning current in Liaoning province is concentrated in summer, and the proportion of positive lightning distribution is the lowest.The amplitude of lightning current in winter is significantly higher at daytime than that at night.Except for August, the lightning frequency in other months is usually higher at daytime than that at night.In western Liaoning, the positive and negative lightning density is generally large, and the positive and negative lightning density decreases with the increase of altitude, and the negative lightning density decreases faster than positive lightning.The amplitude of positive lightning is the highest in western Liaoning province, and the amplitude of positive lightning decreases with the increase of altitude, while the amplitude of negative lightning generally increases with the increase of altitude.The high value area of positive lightning intensity is mainly distributed in the middle and west of Liaoning province, and the high value area of negative lightning intensity is mainly concentrated on both sides of Liaohe River Basin, with the strongest distribution in the east of Liaoning province.On the profile of 41°N, the positive flash density in western Liaoning province is much higher than that in Eastern Liaoning province, and the negative flash density in hilly area of western Liaoning province is significantly lower than that in Liaohe plain in central Liaoning province.In the hilly region of the western Liaoning province, the amplitude change of negative lightning is consistent with the change of altitude.The intensity of positive lightning is the highest in western Liaoning province, the lowest in Eastern Liaoning province, and the intensity of negative lightning is the strongest in the windward slope area in the east of Liaohe plain.

Key words: Lightning location, Lightning density, Lightning current amplitude, Lightning intensity

CLC Number:

P427.3

Pan CHENG,Chenghan LIU,Dongmei CAI,Hongyu SUN,Yue WANG,Shengyuan CHEN,Chuanlei CHEN,Haonan ZHANG,Zhiye ZHU,Dongzhe JIANG. Analysis of lightning distribution and its relationship with altitude in Liaoning province from 2010 to 2021[J]. Journal of Meteorology and Environment, 2023, 39(4): 138-146.

Figures/Tables 11

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等级	高值区	中值区	低值区
正闪划分范围	L≥6.4	4.7≤L＜6.4	L＜4.7
负闪划分范围	L≥24.1	16.6≤L＜24.1	L＜16.6

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Analysis of lightning distribution and its relationship with altitude in Liaoning province from 2010 to 2021

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