Results 51 to 60 of about 43,495 (253)

Influences of Building Slope Angle on the Initiation of Stable Upward Leader

应用气象学报
The slope angle (or top angle) of the building significantly influences the formation of upward leader. To simulate the lightning strike process on tall and sloping building using three-dimensional variable grid leader model, the influence of slope angle
Guo Xiufeng, Zhao Nian, Gao Yue, Zhang Ling, Wang Zhaoxia, Zhao Yubin, Zhang He   +6 more
doaj   +1 more source

Polarimetric radar characteristics of lightning initiation and propagating channels [PDF]

Atmospheric Measurement Techniques, 2019
In this paper we present an analysis of a large dataset of lightning and polarimetric weather radar data collected in the course of a lightning measurement campaign that took place in the summer of 2017 in the area surrounding Säntis, in the northeastern
J. Figueras i Ventura, N. Pineda, N. Pineda, N. Besic, J. Grazioli, A. Hering, O. A. van der Velde, D. Romero, A. Sunjerga, A. Mostajabi, M. Azadifar, M. Rubinstein, J. Montanyà, U. Germann, F. Rachidi   +14 more
doaj   +1 more source

Numerical Simulation of Building Geometry's Influence on Attachment Process of Upward Leader

应用气象学报
High-rise buildings not only increase urban land use efficiency, but also facilitate the attainment of conditions required for lightning leader initiation due to enhanced electric field distortion at the top, thereby increase lightning activity ...
Zhao Yubin, Guo Xiufeng, Zhang He, Zheng Yuhang, Liu Shijie, Zhao Nian   +5 more
doaj   +1 more source

Optical and Current Measurements of Lightning Attachment to the 356-m-High Shenzhen Meteorological Gradient Tower in Southern Coastal Area of China

IEEE Access, 2019
This paper presents in detail the instrumentation for coordinated optical and current measurements of lightning discharges to a 356-m-high meteorological tower and the observation results. The tower, which is located at Shenzhen, a lower latitude coastal
Zongxu Qiu, Yuexin Yang, Zilong Qin, Mingli Chen, Fanchao Lyu, Hongbo Guo, Ya-Ping Du, Yan Gao, Ge Zhang, Shaoyang Wang   +9 more
doaj   +1 more source

Characterization of synoptic environment for mesoscale convective systems over South Korea using ERA5 reanalysis data

Quarterly Journal of the Royal Meteorological Society, EarlyView.
In this study, the synoptic conditions for modes of mesoscale convective systems (MCSs) in South Korea are generalized based on composite analysis. The preferred precipitation region, synoptic patterns, moisture transport, sea surface temperature and thermodynamic and dynamic instabilities are characterized according to four modes: convective cells (CC)
Jeong‐Eun Lee, GyuWon Lee
wiley   +1 more source

Low Frequency Magnetic Field Observations of Natural Positive Leaders Featuring Stepwise Propagation

Geophysical Research Letters, 2023
We examine the low‐frequency (LF) magnetic pulses recorded for the positive leader in two natural lightning flashes as recorded on the high‐speed video camera.
Ziyi Wang, Gaopeng Lu, Xiao Li, Hongbo Zhang, Yanfeng Fan, Huan Ren, Chenxiao Zhang, Rubin Jiang, Xiushu Qie, Morris B. Cohen, Zhichao Wang   +10 more
doaj   +1 more source

Termination of Electron Acceleration in Thundercloud by Intra/Inter-cloud Discharge [PDF]

, 2018
An on-ground observation program for high energy atmospheric phenomena in winter thunderstorms along Japan Sea has been performed via measurements of gamma-ray radiation, atmospheric electric field and low-frequency radio band.
A. Matsuki, Arnaud K. A., D. M. Smith, G. S. Bowers, Goto Y., H. Tsuchiya, K. Makishima, K. Nakazawa, Kitagawa N., M. Kamogawa, M. Kubo, T. Enoto, T. Morimoto, T. Tamagawa, T. Yuasa, Y. Furuta, Y. Nakamura, Y. Wada   +17 more
core   +2 more sources

Bath Vibration During Open Eye Formation in a Physical Model of a Steelmaking Ladle

steel research international, EarlyView.
Using a physical model, this study shows that vibration measurements reliably predict open eye size in steelmaking ladles, offering a practical alternative to visual monitoring. Vessel vibrations stabilize faster than the open eye, except at high frequencies near the bottom.
Mika Pylvänäinen, Juhani Nissilä, Ville‐Valtteri Visuri, Aki Sorsa, Matias Hauru, Jouni Laurila, Toni Liedes   +6 more
wiley   +1 more source

First Measurements of Low‐Medium Frequency Magnetic Radiation for an Altitude‐Triggered Lightning Flash

Geophysical Research Letters, 2022
An altitude‐triggered lightning flash was conducted on the Field Experiment Base on Lightning Sciences, China Meteorological Administration, in the summer of 2021.
Yanfeng Fan, Yang Zhang, Gaopeng Lu, Weitao Lyu, Hengyi Liu, Liangtao Xu, Dong Zheng   +6 more
doaj   +1 more source

Unusual vertical oscillations of a radiosonde

Weather, EarlyView.
In summer 2023 in southern England, several unusual balloon launches were observed which descended for a few minutes before resuming ascent. This unusual vertical oscillation was repeated several times in a ‘roller‐coaster’‐like pattern. This article discusses the behaviour of the balloons.
Caleb Miller, Chun Hay Brian Lo, Stephen Burt, Ryan R. Neely III   +3 more
wiley   +1 more source