Relationship Between X-Rays and the Propagation Speed of Downward Negative Leaders in Rocket-Triggered Lightning

IF 3.8 2区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

Journal of Geophysical Research: Atmospheres Pub Date : 2025-04-29 DOI:10.1029/2024JD042818

Yuan Wang, Baofeng Cao, Yanfeng Fan, Xiaoqiang Li, Yang Zhang, Xiao Li, Zongxiang Li, Yongli Wei, Lihua Wang, Gaopeng Lu, Peng Li, Xiong Zhang

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引用次数: 0

Abstract

On 18 July 2023, X-ray emissions associated with two rocket-triggered lightning flashes were observed at the Field Experiment Base for Lightning Sciences, China Meteorological Administration. In this paper, the relationship between X-ray characteristics and propagation speed of downward negative dart leaders is analyzed for the first time. Results show that within the same lightning flash, there is a strong positive correlation between the leader brightness and its 2D speed, as evidenced by a high correlation coefficient, R, of +0.94. Consistently, the intensity of X-rays generally exhibits a positive correlation with the leader 2D speed. Conversely, the average X-ray pulse interval is negatively correlated with the leader 2D speed, with a significant correlation coefficient, R, of −0.93. Furthermore, the intervals of partial steps of dart leader can be characterized by the intervals between the X-ray pulses.

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火箭触发闪电中x射线与向下负前导传播速度的关系

2023年7月18日，在中国气象局雷电科学野外实验基地观测到两次火箭触发闪电的x射线辐射。本文首次分析了x射线特性与向下负导道传播速度的关系。结果表明，在同一次闪电中，前导亮度与其二维速度之间存在较强的正相关关系，相关系数R为+0.94。一致地，x射线的强度通常与前导二维速度呈正相关。相反，x射线脉冲平均间隔与先导二维速度呈显著负相关，相关系数R为- 0.93。此外，可以用x射线脉冲之间的间隔来表征省道前导部分步骤的间隔。

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来源期刊

Journal of Geophysical Research: Atmospheres Earth and Planetary Sciences-Geophysics

CiteScore

7.30

自引率

11.40%

发文量

684

期刊介绍： JGR: Atmospheres publishes articles that advance and improve understanding of atmospheric properties and processes, including the interaction of the atmosphere with other components of the Earth system.