黑龙江省闪电活动特征及其与地面相对湿度的响应关系

doi:10.3969/j.issn.1673-503X.2020.05.012

Abstract

Abstract:

The lightning location and daily mean surface relative humidity (R_H) data in Heilongjiang province during 2006-2017 were used to analyze the relationships between the density and intensity of lightning and R_H based on mathematical statistics, Pearson correlation analysis and GIS spatial analysis methods.The results indicate that the smaller or larger R_H is disadvantageous to the generation of lightning activity.Specifically, the lightning hardly occurs if R_H is less than 25%, and it is gradually easily triggered with the increase of R_H between 25% and 77%.However, the lightning is decreasing with the increase of R_H if the latter is larger than 79%.In addition, R_H less than 77% has positive and negative correlation with density and intensity of lighting, respectively.Inversely, R_H larger than 79% shows negative and positive correlation with density and intensity of lighting, respectively.The threshold of R_H is between 77% and 79%.The interval of 70%-90% is the lightning-prone R_H, where the lightning density is closely related to R_H and the lightning tends to occur in clusters.

Key words: Lightning density, Lightning intensity, Relative humidity, Relationship

CLC Number:

P446

Xiang-ling YUAN, Hong-xu MA, Shi-ding CHEN, Chun-fang LIU. Characteristics of lightning activity and its response to the surface relative humidity in Heilongjiang province[J]. Journal of Meteorology and Environment, 2020, 36(5): 91-96.

Figures/Tables 7

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Characteristics of lightning activity and its response to the surface relative humidity in Heilongjiang province

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