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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Model of blue jet formation and propagation in the nonuniform atmosphere
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Model of blue jet formation and propagation in the nonuniform atmosphere

机译：的蓝色喷气形成和传播模式非均匀大气

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摘要

About two decades ago, researchers discovered upward propagating flashes of light originating above thunderstorms. Due to their distinctive, principally blue color, they were named “blue jets” (BJ). The broadly accepted production mechanism of a BJ is through a lightning leader which rises through the nonuniform atmosphere. Specifically, the formation of the initial lightning leader is thought to be governed by the contraction of the current of a streamer flash into a small radius channel. This paper presents results of simulations of the current contraction in the air as a function of both the pressure and convective heat removal time. We have shown that transitions to the contracted state occur in a hysteresis mode that allows both contracted and diffusive states to coexist. We have obtained the critical current for this phase transition and studied the formation and propagation of BJs in the atmosphere through a combination of quantitative models and existing observations of BJs that combine optical images with the data of the electric current carried by the jets.
机译：大约二十年前,研究人员发现上行传播闪光原始雷暴之上。主要是蓝色,他们命名为“蓝色飞机”(BJ)。BJ的机制是通过闪电的领袖通过非均匀上升的大气。具体地说,最初的形成被认为是由闪电领袖收缩的当前流光闪到一个小半径通道。模拟当前收缩的结果在空气压力和的函数对流热移除。过渡到状态发生在萎缩让简约和磁滞模式扩散共存。这个相变和临界电流研究了毕加索的形成和传播通过结合的氛围定量模型和现有的观察毕加索把光学图像与数据的电流由飞机。

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