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首页> 外文会议>NATO Advanced Study Institute on Sprites, Elves and Intense Lightning Discharges; 20040724-31; Corte(FR) >LOCATION AND ELECTRICAL PROPERTIES OF SPRITE-PRODUCING LIGHTNING FROM A SINGLE ELF SITE
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LOCATION AND ELECTRICAL PROPERTIES OF SPRITE-PRODUCING LIGHTNING FROM A SINGLE ELF SITE

机译：单个ELF站点中产生SPRITE的闪电的位置和电特性

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摘要

Recently discovered TLEs (Transient Luminous Events) such as red sprites and elves provided a great opportunity to revisit the electromagnetic waves in the lower ELF (Extremely Low Frequency) region known as the Schumann resonances (SR). The resonance behavior is afforded by the low attenuation experienced by electromagnetic waves in this frequency range. Since TLEs are caused by energetic lightning with abundant energy in this range, these so-called ELF transients can be analyzed on a global basis from single measurement stations. In particular, the geographical location and the vertical charge moment of the lightning flash may be determined remotely. In this chapter, we aim at providing readers with an overview of electromagnetic waves from lightning in the SR frequency band. Then we introduce the technique to determine the location and demonstrate the global mapping of lightning for different thresholds of charge moment change based on the ELF transient observations in Rhode Island, USA. Meteorological interpretations of the global maps are also provided. Furthermore the sprite-producing winter lightning activity is characterized in Hokuriku by using the ELF field site in Moshiri, Japan. The generation condition for winter sprites and their coupling to the tropospheric lightning and to the ionosphere are also presented.
机译：最近发现的TLE（瞬态发光事件），例如红色的精灵和精灵，提供了一个很好的机会，可以重温被称为舒曼共振（SR）的较低ELF（极端低频）区域中的电磁波。在此频率范围内，电磁波所经历的低衰减可提供共振性能。由于TLE是由在此范围内具有大量能量的高能闪电引起的，因此可以从单个测量站全局分析这些所谓的ELF瞬变。特别是，可以远程确定闪电的地理位置和垂直充电力矩。在本章中，我们旨在为读者提供SR频段雷电产生的电磁波的概述。然后，我们基于美国罗德岛的ELF瞬态观测结果，介绍了确定位置的技术，并演示了针对不同充电力矩变化阈值的闪电全局映射。还提供了全球地图的气象解释。此外，北陆地区利用日本Moshiri的ELF现场，对产生雪碧的冬季闪电活动进行了特征描述。还介绍了冬季精灵的生成条件及其与对流层闪电和电离层的耦合。

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