西北师范大学学报（自然科学版）2025，Vol.61Issue(4)：100-106,114,8.DOI:10.16783/j.cnki.nwnuz.2025.04.012
闪电电磁功率及与光谱特征的相关性
Electromagnetic power of lightning and its correlation with spectral characteristics
摘要
Abstract
The energy of electromagnetic radiation produced by lightning is a primary concern in lightning protection and research.Currently,there are few reports on studies of lightning electromagnetic radiation energy and its correlation with discharge channel parameters.In this paper,the peak electromagnetic power and the energy dissipated per unit length of the discharge channel during return strokes were estimated,using spectra from six multi-stroke negative cloud-to-ground lightning events captured by slit-less high-speed spectrographs,along with lightning electric field variation waveforms.The correlations among the spectral characteristics of lightning,the square of the core radius of the current-carrying channel,the negative square of the resistance,and the peak electromagnetic power were analyzed.The results show that the electromagnetic radiation of lightning is closely related to the total intensity of the ion lines in the spectrum and the energy dissipated per unit length of the discharge channel.There is a positive correlation between the peak electromagnetic power of lightning radiation and the total intensity of ion lines,as well as between the peak electromagnetic power and the energy dissipated per unit length of the channel.Additionally,the radius and resistance of the core current-carrying channel are important parameters affecting lightning electromagnetic radiation energy.关键词
闪电光谱/负地闪/回击/峰值电磁功率/能量Key words
lightning spectra/negative ground lightning/return stroke/peak electromagnetic power/energy分类
天文与地球科学引用本文复制引用
孙萌,安婷婷,袁丽珍,袁萍..闪电电磁功率及与光谱特征的相关性[J].西北师范大学学报（自然科学版）,2025,61(4):100-106,114,8.基金项目
国家自然科学基金资助项目(42175100) （42175100）
西北师范大学青年教师科研基金(20230019) （20230019）
