Multi-instrumental observations of a positive gigantic jet produced by a winter thunderstorm in Europe
Multi-instrumental observations of a positive gigantic jet produced by a winter thunderstorm in Europe
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DOI：
10.1029/2010jd014442
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发表时间：
2010-12-16
影响因子：
4.4
通讯作者：
Farges, Thomas
中科院分区：
文献类型：
--
作者：
van der Velde, Oscar A.;Bor, Jozsef;Farges, Thomas
2009年12月12日2336：56 UTC，意大利的一名观察者记录到了一股明亮的巨型喷流（GJ）。当晚还观察到49个额外的精灵、精灵、光环和两个向上的闪电。GJ的位置对应于科西嘉的阿雅克肖以西的一个明显云顶（零下34摄氏度）。GJ达到了大约91公里的高度，“尾随喷气”达到了49-59公里，与早期报道的GJ相匹配。持续时间短，在120-160毫秒。这是第一个记录的GJ出现在海上冬季雷暴只有6.5公里高，显示高云顶不需要GJ的启动。在强烈的垂直风切变的存在下，气象情况与地中海典型的秋季和冬季雷暴不同。在GJ的尾流阶段，一个由附近的云对地闪电触发的带有晕的雪碧发生在相对较低的高度（
At 2336:56 UTC on 12 December 2009, a bright gigantic jet (GJ) was recorded by an observer in Italy. Forty-nine additional sprites, elves, halos and two cases of upward lightning were observed that night. The location of the GJ corresponded to a distinct cloud top (-34 degrees C) west of Ajaccio, Corsica. The GJ reached approximately 91 km altitude, with a "trailing jet" reaching 49-59 km, matching with earlier reported GJs. The duration was short at 120-160 ms. This is the first documented GJ which emerged from a maritime winter thunderstorm only 6.5 km tall, showing high cloud tops are not required for initiation of GJs. In the presence of strong vertical wind shear, the meteorological situation was different from typical outbreaks of fall and winter thunderstorms in the Mediterranean. During the trailing jet phase of the GJ, a sprite with halo triggered by a nearby cloud-to-ground lightning flash occurred at a relatively low altitude (