Analysis on Characteristics of Cloud-to-Ground Lightning from Ten Typical Squall Lines in the Beijing-Tianjin-Hebei Region and Their Relationship with Disastrous Weather
Wu Ziyu
Yao Wen
Abstract：Using a variety of data,the characteristics of cloud-to-ground(CG)lightning in various stages of 10 typical squall lines in the Beijing-Tianjin-Hebei Region from 2007 to 2013 and their relation-ships with disastrous weather was analyzed.The results showed that the CG lightning was mainly distribu-ted in the strong echoes of 35-55 dBZ at the front of the squall line.The temporal evolution of CG light-ning showed that the frequency evolution of positive CG lightning best reflected the generation-decline and strength changes of squall lines.In the cases where positive CG lightning was dominant,the difference in the number of positive and negative CG lightning was small.In the cases where negative CG lightning was dominant,the difference in the number of positive and negative CG lightning was large.In the dominant cases of negative CG lightning,the squall line had a larger average size and a longer duration,at the same time,the squall line produced more CG lightning,strong winds and short-term strong precipitation stations,and the rain intensity was also higher.In the cases of squall line where either positive or nega-tive CG lightning was dominant,the high occurrence of positive CG lightning indicated or accompanied frequent occurrence of disastrous weather.Considering the squall line system as a whole,the temporal evolution of CG lightning showed that the frequency evolution of positive CG best reflected the generation-decline and high frequency of strong winds and short-term strong precipitation,as well as the intensity of rain.The rising frequency of positive CG lightning was indicative of the formation and strengthening of squall lines,as well as the occurrence and frequency of disastrous weather.
Keywords：squall linecloud-to-ground lightningstrong windhailshort-term strong precipitation
Publication Date：2026-01-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 22-31 )