DOI: 10.1002/2013JD020078
论文题名: Validation of the cooray-rubinstein (C-R) formula for a rough ground surface by using three-dimensional (3-D) FDTD
作者: Li D. ; Zhang Q. ; Liu T. ; Wang Z.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 22 起始页码: 12749
结束页码: 12754
语种: 英语
英文关键词: C-R formula
; lightning horizontal field
; three-dimensional FDTD
Scopus关键词: Approximation algorithms
; Electric fields
; Finite difference time domain method
; Fractals
; Three dimensional
; Time domain analysis
; Approximate formulas
; C-R formula
; Earth conductivity
; Finite-difference time-domain (FDTD) methods
; Fractal rough ground surfaces
; Horizontal electric fields
; Horizontal fields
; Threedimensional (3-d)
; Lightning
; accuracy assessment
; atmospheric electricity
; electric field
; error analysis
; finite difference method
; lightning
; three-dimensional modeling
英文摘要: In this paper, we have extended the Cooray-Rubinstein (C-R) approximate formula into the fractal rough ground surface and then validate its accuracy by using three-dimensional (3-D) finite-difference time-domain (FDTD) method at distances of 50 m and 100 m from the lightning channel. The results show that the extended C-R formula has an accepted accuracy for predicting the lightning-radiated horizontal electric field above the fractal rough and conducting ground, and its accuracy increases a little better with the higher of the earth conductivity. For instance, when the conductivity of the rough ground is 0.1 S/m, the error of the peak value predicted by the extended C-R formula is less than about 2.3%, while its error is less than about 6.7% for the conductivity of 0.01 S/m. The rough ground has much effect on the lightning horizontal field, and the initial peak value of the horizontal field obviously decreases with the increase of the root-mean-square height of the rough ground at early times (within several microseconds of the beginning of return stroke). Key Points C-R formula can be extended to the case of the rough ground Accuracy of the C-R formula has been examined by 3-D FDTD C-R formula can well predict horizontal field with accepted accuracy ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 41275009
; 41375037
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63165
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China; Laboratory for Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China
Recommended Citation:
Li D.,Zhang Q.,Liu T.,et al. Validation of the cooray-rubinstein (C-R) formula for a rough ground surface by using three-dimensional (3-D) FDTD[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(22)