Optical emissions associated with narrow bipolar events from thunderstorm clouds penetrating into the stratosphere.
Optical emissions associated with narrow bipolar events from thunderstorm clouds penetrating into the stratosphere.
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与穿透平流层的雷暴云的窄双极事件相关的光发射
DOI：
10.1038/s41467-021-26914-4
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发表时间：
2021-11-17
影响因子：
16.6
通讯作者：
Zhu B
中科院分区：
文献类型：
--
作者：
Liu F;Lu G;Neubert T;Lei J;Chanrion O;Østgaard N;Li D;Luque A;Gordillo-Vázquez FJ;Reglero V;Lyu W;Zhu B
窄双极事件（NBEs）是由地面接收器观测到的雷暴无线电信号中的特征。nbe可能发生在闪电开始时，但其放电过程尚不清楚。在这里，我们介绍了国际空间站大气-空间相互作用监测仪（ASIM）的光谱测量结果，这些测量结果与地面接收器阵列观测到的9个负向和3个正向nbe有关。我们发现NBEs的两个极性都与337 nm的发射有关，而在777.4 nm的发射很弱或没有检测到，这表明NBEs与流光击穿有关。负NBEs的发射上升时间约为10 μs，与光子被云粒子散射较少的云顶位置一致；正NBEs的发射上升时间约为1 ms，与云深处位置一致。对于负nbe，发射强度与相关nbe的峰值电流几乎呈线性相关。我们的发现表明，无线电信号的地面观测为测量对流层顶附近云顶放电的发生和强度提供了一种新的手段。
Narrow bipolar events (NBEs) are signatures in radio signals from thunderstorms observed by ground-based receivers. NBEs may occur at the onset of lightning, but the discharge process is not well understood. Here, we present spectral measurements by the Atmosphere‐Space Interactions Monitor (ASIM) on the International Space Station that are associated with nine negative and three positive NBEs observed by a ground‐based array of receivers. We found that both polarities NBEs are associated with emissions at 337 nm with weak or no detectable emissions at 777.4 nm, suggesting that NBEs are associated with streamer breakdown. The rise times of the emissions for negative NBEs are about 10 μs, consistent with source locations at cloud tops where photons undergo little scattering by cloud particles, and for positive NBEs are ~1 ms, consistent with locations deeper in the clouds. For negative NBEs, the emission strength is almost linearly correlated with the peak current of the associated NBEs. Our findings suggest that ground-based observations of radio signals provide a new means to measure the occurrences and strength of cloud-top discharges near the tropopause.
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影响因子：
1.9
作者：
Jacobson, A. R.;Light, T. E. L.
通讯作者：
Light, T. E. L.
影响因子：
4.4
作者：
Kostinskiy, Alexander Yu;Marshall, Thomas C.;Stolzenburg, Maribeth
通讯作者：
Stolzenburg, Maribeth
影响因子：
4.4
作者：
Light, T. E. L.
通讯作者：
Light, T. E. L.
两次产生蓝色放电的中纬度雷暴的气象和电力条件
影响因子：
4.4
作者：
Liu, Feifan;Zhu, Baoyou;Zhou, Helin
通讯作者：
Zhou, Helin
影响因子：
5.2
作者：
Chanrion, Olivier;Neubert, Torsten;Siingh, Devendraa
通讯作者：
Siingh, Devendraa