Excitation of Earth‐ionosphere cavity resonances by sprite‐associated lightning flashes
Excitation of Earth‐ionosphere cavity resonances by sprite‐associated lightning flashes
复制标题
与精灵相关的闪电激发地球电离层空腔共振
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
S. Reising
中科院分区：
文献类型：
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作者：
M. Füllekrug;S. Reising
在德国的锡尔伯伯恩和加州的霍利斯特，间隔为1.91毫米，同时记录的地球电离层腔共振的离散激发被用于三角测量美国大陆闪电的源位置，精确度为1.08毫米，经国家闪电探测网络验证。已识别的闪电主要与第一次回击峰值电流为20-70 kA的正云对地放电有关。这些特殊的闪电中有80%与精灵有关，这是由科罗拉多尤卡岭的同时低光水平电视摄像机观测所证实的。这种高概率的精灵检测归因于特别大的云对地闪电电流，同时激发地球电离层空腔谐振和精灵。
Simultaneously recorded discrete excitations of Earth‐ionosphere cavity resonances at Silberborn, Germany, and Hollister, California, ∼9.1 Mm apart, are used to triangulate source locations of lightning flashes in the continental United States with an accuracy of ∼0.8 Mm, as verified by the National Lightning Detection Network. The identified lightning flashes are mainly associated with positive cloud‐to‐ground discharges with first return stroke peak currents ∼20–70 kA. 80% of these particular lightning flashes are associated with sprites, as verified by simultaneous low‐light level TV camera observations at Yucca Ridge, Colorado. This high probability of sprite detection is attributed to particularly large cloud‐to‐ground lightning currents, simultaneously exciting both Earth‐ionosphere cavity resonances and sprites.