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首页> 外文期刊>Electric power systems research >LMA observations of upward lightning flashes at the Santis Tower initiated by nearby lightning activity
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LMA observations of upward lightning flashes at the Santis Tower initiated by nearby lightning activity

机译：LMA观测到附近的闪电活动引发了Santis塔上的向上闪电

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摘要

We present in this paper lightning current measurements, LMA (Lightning Mapping Array) data and fast antenna electric fields associated with upward flashes observed at the Santis Tower during summer of 2017. The LMA network consists of six stations that were installed in the vicinity of the tower at distances ranging from 100 m to 11 km from it. Out of 20 LMA recorded flashes here we analyze in detail three so-called 'other-triggered flashes', triggered by preceding activity. Based on the lightning activity derived from the European Lightning Detection Network (EUCLID) in an area within 30 km from the tower and within a 1-s time window before the start of the upward tower flashes, only one out of 20 flashes was classified as 'other-triggered'(OT). However, the investigations based on the LMA data reveal that 3 more flashes of the 20 analyzed were preceded by nearby activity and should therefore be classified as OT flashes. We analyze conditions conducive to the OT flashes, such as the charge structure of the clouds, polarity of preceding leaders and level of activity of the storm.The LMA source active time period was on average seven times higher for the OT flashes than that for self-initiated flashes.
机译：我们在本文中介绍了雷电流测量，LMA（闪电映射阵列）数据以及与2017年夏季在Santis塔上观察到的向上闪烁相关的快速天线电场。LMA网络由六个站点组成，这些站点安装在附近塔距距离100 m至11 km。在这里，我们从20条LMA录制的闪光中详细分析了由先前的活动触发的三种所谓的“其他触发的闪光”。根据欧洲闪电检测网络（EUCLID）在距塔楼30公里以内，在向上塔楼闪光灯开始前1秒的时间范围内的闪电活动，将20次闪光中只有1次归类为“其他触发”（OT）。但是，基于LMA数据的调查表明，在所分析的20种闪烁中，还有3次闪烁之前是附近的活动，因此应归类为OT闪烁。我们分析了有利于OT闪光的条件，例如云层的电荷结构，前导的极性和风暴的活动水平.OTA闪光的LMA源活动时间平均比其自身高7倍-闪烁。

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