DOI: 10.1002/2015GL067064
论文题名: A new population of terrestrial gamma-ray flashes in the RHESSI data
作者: Østgaard N. ; Albrecthsen K.H. ; Gjesteland T. ; Collier A.
刊名: Geophysical Research Letters
ISSN: 0094-8317
EISSN: 1944-8048
出版年: 2015
卷: 42, 期: 24 起始页码: 10937
结束页码: 10942
语种: 英语
英文关键词: fluence distributions
; lightning
; radio waves VLF
; terrestrial gamma-ray flashes
Scopus关键词: Image sensors
; Lightning
; Population statistics
; Energetic photons
; Fluence distribution
; Lightning discharge
; Lightning location
; Reuven Ramaty High Energy Solar Spectroscopic Imager
; Search Algorithms
; Space-borne instruments
; Terrestrial Gamma ray Flashes
; Gamma rays
; algorithm
; electron
; field of view
; frequency analysis
; gamma ray radiation
; instrumentation
; lightning
; radio wave
; sensitivity analysis
; spacecraft
; spatial distribution
; temporal analysis
英文摘要: Terrestrial gamma-ray flashes (TGFs) are the most energetic photon phenomenon occurring naturally on Earth. An outstanding question is as follows: Are these flashes just a rare exotic phenomenon or are they an intrinsic part of lightning discharges and therefore occurring more frequently than previously thought? All measurements of TGFs so far have been limited by the dynamic range and sensitivity of spaceborne instruments. In this paper we show that there is a new population of weak TGFs that has not been identified by search algorithms. We use the World Wide Lightning Location Network (WWLLN) to identify lightning that occurred in 2006 and 2012 within the 800 km field of view of Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). By superposing 740,210 100 ms RHESSI data intervals, centered at the time of the WWLLN detected lightning, we identify at least 141 and probably as many as 191 weak TGFs that were not part of the second RHESSI data catalogue. This supports the suggestion that the global TGF production rate is larger than previously reported. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955176677&doi=10.1002%2f2015GL067064&partnerID=40&md5=18ba0469ba932b1e7b26e06b75d784e6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7933
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physics and Technology, Birkeland Centre for Space Science, University of Bergen, Bergen, Norway
Recommended Citation:
Østgaard N.,Albrecthsen K.H.,Gjesteland T.,et al. A new population of terrestrial gamma-ray flashes in the RHESSI data[J]. Geophysical Research Letters,2015-01-01,42(24).