Results 51 to 60 of about 3,916 (177)

The attachment process of rocket‐triggered lightning dart‐stepped leaders [PDF]

Journal of Geophysical Research: Atmospheres, 2016
AbstractTime‐correlated 1.54 µs high‐speed video frames, channel‐base current and current derivative (dI/dt), and electric field derivative (dE/dt) measurements are used to analyze the attachment process of triggered lightning dart‐stepped leaders. Lengths, speeds, and durations of the upward‐connecting positive leaders propagating from the launching ...
J. D. Hill, M. A. Uman, D. M. Jordan, T. Ngin, W. R. Gamerota, J. Pilkey, J. Caicedo   +6 more
openaire   +1 more source

The Effect of Seductive Details on Knowledge Retention in Physics Videos: A Mixed Methods Study

Journal of Research in Science Teaching, Volume 62, Issue 8, Page 1923-1940, October 2025.
ABSTRACT Research reports that interesting but irrelevant information, seductive details, in teaching material can impede learning. In science education, the inclusion of historical narratives in lessons to promote interest has been recommended but may hinder learning.
Richard Brock, Liam Cini O'Dwyer, Ben Rogers   +2 more
wiley   +1 more source

Rocket‐triggered lightning propagation paths relative to preceding natural lightning activity and inferred cloud charge [PDF]

Journal of Geophysical Research: Atmospheres, 2014
AbstractLightning Mapping Array (LMA) data are used to compare the propagation paths of seven rocket‐triggered lightning flashes to the inferred charge structure of the thunderstorms in which they were triggered. This is the first LMA study of Florida thunderstorm charge structure.
J. T. Pilkey, M. A. Uman, J. D. Hill, T. Ngin, W. R. Gamerota, D. M. Jordan, J. Caicedo, B. Hare   +7 more
openaire   +1 more source

A Comprehensive Analysis of Optical Emissions, Production of NOx, HOx, and Other Chemical Species by Lightning

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 18, 28 September 2025.
Abstract We analyze lightning optical emissions and their production of different chemical species with particular emphasis on NOx ${\text{NO}}_{x}$ and HOx ${\text{HO}}_{x}$. We calculate synthetic lightning spectra with inputs from an electrodynamical model of hot air lightning plasmas.
Francisco J. Pérez‐Invernón, Jean‐Francois Ripoll, Francisco J. Gordillo‐Vázquez, Alejandro Luque, Pablo A. Camino‐Faillace, Dongshuai Li, Torsten Neubert, Olivier Chanrion, Nikolai Østgaard   +8 more
wiley   +1 more source

Comparing precursory discharges in positive and negative rocket-triggered lightning

, 2022
Here, we upload the .fig file of three cases of triggered lightning, including channel-base current and near-range B-field waveforms.
Li, Xiao, Gaopeng Lu
openaire   +1 more source

Return stroke peak current versus charge transfer in rocket‐triggered lightning [PDF]

Journal of Geophysical Research: Atmospheres, 2010
We examined data on 117 return strokes in 31 rocket‐and‐wire‐triggered lightning flashes acquired during experiments conducted from 1999 through 2004 at the International Center for Lightning Research and Testing at Camp Blanding, Florida, in order to compare the peak currents of the lightning return strokes with the corresponding charges transferred ...
J. Schoene, M. A. Uman, V. A. Rakov
openaire   +1 more source

Correlated Lightning Mapping Array (LMA) and Radar Observations of the Initial Stages of Florida Triggered Lightning Discharges [PDF]

, 2012
We characterize the geometrical and electrical characteristics of the initial stages of nine Florida triggered lightning discharges using a Lightning Mapping Array (LMA), a C-band SMART radar, and measured channel-base currents.
Biggerstaff, M. I., Blakeslee, R., Hill, J. D., Jordan, D. M., Pilkey, J., Rison, W., Uman, M, A.   +6 more
core   +1 more source

The Impact of Intracloud Negative Branches on Continuing Current in Negative Cloud‐to‐Ground Lightning

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Continuing current (CC) in cloud‐to‐ground (CG) lightning plays a critical role, particularly in wildfire ignition, yet CC's mechanism remains an open question. This study analyzes six CG flashes captured by the high‐speed camera at Beijing and Lhasa, which reveal the propagation of intracloud negative leaders before and after each return ...
Jizhou Feng, Shanfeng Yuan, Rubin Jiang, Yu Wang, Chunfa Sun, Huimin Lyu, Zhuling Sun, Dongfang Wang, Mingyuan Liu, Jiangwan Zhu, Zifan Huang, Zhengqi Wang, Xiushu Qie   +12 more
wiley   +1 more source

The electric field changes and UHF radiations caused by the triggered lightning in Japan [PDF]

In the rocket triggered lightning experiment of fiscal 1989, researchers observed electromagnetic field changes and UHF electromagnetic radiation accompanying rocket triggered lightning.
Horii, Kenji, Kanao, Tadashi, Kawasaki, Zen-Ichiro, Matsuura, Kenji, Nakamura, Koichi, Nakano, Minoru   +5 more
core   +1 more source

Hard, Bright X‐Ray Bursts in Natural Lightning: Blurring the Boundary Between X‐Ray Bursts and TGFs

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract In this study, we analyzed a rare hard, bright X‐ray burst associated with intense natural lightning. Through spectral analysis and source model fitting, we demonstrate that the energy spectrum of the X‐ray source region exhibits significant uncertainty due to the strong dependence on radiation beam geometry, which may appear as a TGF‐like ...
Xiong Zhang, Yuan Wang, Peng Li, Weitao Lyu, Rubin Jiang, Yang Zhang, Yanfeng Fan, Xiaoqiang Li, Baofeng Cao   +8 more
wiley   +1 more source