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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Chemical and thermal impacts of sprite streamers in the Earth's mesosphere
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Chemical and thermal impacts of sprite streamers in the Earth's mesosphere

机译：雪碧飘带的化学和热的影响地球的中间层

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摘要

A one-dimensional self-consistent model has been developed to study the chemical and thermal effects of a single sprite streamer in the Earth's mesosphere. We have used sprite streamer profiles with three different driving current durations (5 ms, 50 ms, and 100 ms) between 50 and 80 km of altitude and considering a kinetic scheme of air with more than 90 chemical species. Our model predicts strong increases in practically all the concentrations of the species studied at the moment of the streamer head passage. Moreover, their densities remain high during the streamer afterglow phase. The concentration of electrons can reach values of up to 10~8 cm~(?3) in the three cases analyzed. The model also predicts an important enhancement, of several orders of magnitude above ambient values, of nitrogen oxides and several metastables species. On the other hand, we found that the 4.26 μm IR emission brightness of CO_2 can reach 10 GR at low altitudes (< 65 km) for the cases of intermediate (50 ms) and long (100 ms) driving currents. These results suggest the possibility of detecting sprite IR emissions from space with the appropriate instrumentation. Finally, we found that the thermal impact of sprites in the Earth's mesosphere is proportional to the driving current duration. This produces variations of more than 40 K (in the extreme case of a 100 ms driving current) at low altitudes (< 55 km) and at about 10 s after the streamer head.
机译：一维自洽模型开发研究化学和热一个精灵拖缆的影响地球的中间层。概要文件和三个不同的驱动电流持续时间(5 ms, 50毫秒,100 ms) 50之间和80公里的高度,考虑动能计划的空气有超过90种化学物质。我们的模型预测强劲增长几乎所有物种的浓度研究目前的拖缆头通道。在等浮电缆余辉阶段。电子的浓度可以达到的值10 ~ 8厘米~(? 3)的三种情况进行了分析。模型还预测,一个重要的增强好几个数量级以上环境价值观,的氮氧化物和几个亚稳态物种。4.26μm红外辐射亮度的二氧化碳可以达到10 GR在低海拔(< 65公里)的情况下中间(50 ms)和长期(100毫秒)驾驶电流。检测雪碧红外排放空间适当的仪器。发现热影响的精灵地球的中间层驱动成正比当前的时间。超过40 K(在100 ms的极端的例子驱动电流)在低海拔(< 55公里)在大约10 s后拖缆头。

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