搜索
  • SafeFromLightning

向上的闪电从附近的闪电事件中获取线索






















在混乱的雷雨中, 向上移动的闪电偶尔会从高层建筑的顶部弹出来. Scientists don't fully understand how upward lightning is triggered; it is likely a combination of multiple environmental factors, 比如背景电场和结构的高度. 在一项新的研究中,Sunjerga等人. 研究高建筑物附近的闪电事件如何触发向上的闪电.


该团队创建了一个简化的模型,模拟了在被向上闪电之前在塔附近观察到的不同场景. 该模型能够解释,由于附近的闪电活动,导致一个结构产生向上的闪电的机制.

根据他们的模拟, both the relatively slow leader discharge (the precursor paths that lightning will follow) passing above the tower and the much faster return stroke (the bright flash we see as lightning) in the vicinity of the structure can enhance the ambient electric field enough to trigger upward lightning from towers as short as about 30 meters—about 10 stories.


该研究证实了附近闪电和塔上闪电之间存在因果关系. 对当地地理等因素的额外研究, 每个场景的频率, 风速可以帮助进一步解释这种不寻常的现象.

0的观点0评论