| DOI: | 10.1002/2014GL062392
|
| 论文题名: | Return stroke speed of cloud-to-ground lightning estimated from elve hole radii |
| 作者: | Blaes P.R.; Marshall R.A.; Inan U.S.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9490
|
| EISSN: | 1944-9221
|
| 出版年: | 2014
|
| 卷: | 41, 期:24 | | 起始页码: | 9182
|
| 结束页码: | 9187
|
| 语种: | 英语
|
| 英文关键词: | Elves
; lightning
; return stroke speed
|
| Scopus关键词: | Bayesian networks
; Clouds
; D region
; Electromagnetic pulse
; Inference engines
; Ionosphere
; Lightning
; Numerical models
; Probability distributions
; Bayesian inference
; Cloud-to-ground lightning
; Current propagation
; Elve-producing lightning
; Elves
; Lightning return stroke
; Maximum A posteriori probabilities
; Return stroke
; Speed
; Bayesian analysis
; cloud to ground lightning
; data set
; electromagnetic radiation
; ionosphere
; numerical model
|
| 英文摘要: | We present the first measurements of the lightning return stroke speed that directly relate to the current return stroke, as opposed to its optical manifestation. The shape of elves is determined by the electromagnetic pulse (EMP) radiation pattern at D region altitudes, which is in turn controlled by the geometry and current propagation properties of the return stroke channel. In particular, numerical simulation of the EMP-ionosphere interaction shows a strong relationship between the elve "hole" radius and the current return stroke speed. The hole radii are measured from a data set of 55 elves observed with the PIPER photometer. Using these radii observations in conjunction with numerical simulations of the EMP, we perform Bayesian inference to estimate the distribution of return stroke speeds. The results show a maximum a posteriori probability return stroke speed estimate of 0.64c for elve producing lightning. Key Points We establish the relationship between return stroke speed and elve geometryWe estimate the distribution of return stroke speeds for 55 elve observationsThe return stroke speed of elve-causative lightning is faster than expected ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921769441&doi=10.1002%2f2014GL062392&partnerID=40&md5=572c654e242f683a02240d0eaef387cf
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6754
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Department of Electrical Engineering, Stanford University, Stanford, CA, United States
|
| Recommended Citation: | |
Blaes P.R.,Marshall R.A.,Inan U.S.. Return stroke speed of cloud-to-ground lightning estimated from elve hole radii[J]. Geophysical Research Letters,2014-01-01,41(24).
|
|
|