[张贴报告]Comparison Between High-Speed Video Observation of Sprites and Broadband Sferic Measurements

Comparison Between High-Speed Video Observation of Sprites and Broadband Sferic Measurements
编号:2292 稿件编号:2361 访问权限:私有 更新:2023-04-15 18:12:22 浏览:176次 张贴报告

报告开始:2023年05月06日 08:46 (Asia/Shanghai)

报告时间:1min

所在会议:[SP] 张贴报告专场 » [SP-13-1] 13、大气物理与气象气候

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摘要
High-speed video observations of two sprites with halo features were analyzed with concurrent measurements of broadband magnetic sferics. Both events were produced by positive cloudto-ground (CG) strokes. Moreover, the halo features appeared less than 0.5 ms after the return stroke, and the first sprite elements followed within 1 and 3 ms, respectively, for the two cases. The persistent charge transfer in the causative stroke from long continuing current can maintain the continuous glowing of existing sprite elements, and also may aid the vertical development and enhanced luminescence of later sprite elements. The observations with electric field (E-field) simulations by the transmission line model provide evidence that the induction component of the lightning-induced E-field contributes significantly to halo formation. Our results suggest additional measurements and analysis are needed to identify the specific role of induction E-field in addition to the well-known quasi-electrostatic (QE) field in the lightning-induced impact on the mesosphere.
关键字
red sprite;high-speed video observation
报告人
任欢
中国科学技术大学

稿件作者
陆高鹏 中国科学技术大学
任欢 中国科学技术大学
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