DOI: 10.1002/2013GL058895
论文题名: Enhanced ionization of the Martian nightside ionosphere during solar energetic particle events
作者: Němec F. ; Morgan D.D. ; Diéval C. ; Gurnett D.A. ; Futaana Y.
刊名: Geophysical Research Letters
ISSN: 0094-10404
EISSN: 1944-10135
出版年: 2014
卷: 41, 期: 3 起始页码: 793
结束页码: 798
语种: 英语
英文关键词: Mars Express
; MARSIS
; nightside ionosphere
Scopus关键词: Carrier concentration
; Electron density measurement
; Electrons
; Ionization
; Ionospheric measurement
; Radar
; Spacecraft
; Mars Express spacecraft
; MARS-EXPRESS
; MARSIS
; Shadow effects
; Solar energetic particle events
; Solar energetic particles
; Sounding radar
; Sounding signals
; Ionosphere
; electron
; instrumentation
; ionization
; ionosphere
; Mars
; Martian atmosphere
; particulate matter
英文摘要: Electron densities in the Martian nightside ionosphere are more than 90% of time too low to be detected by the Mars Advanced Radar for Subsurface and Ionosphere Sounding radar sounder on board the Mars Express spacecraft. However, the relative number of ionograms with peak electron density high enough to be detected represents a good statistical proxy of the ionospheric density. We focus on solar energetic particle (SEP) events, and we analyze their effects on ionospheric formation. SEP time intervals were identified in situ using the background counts recorded by the ion sensor of the ASPERA-3 instrument on board Mars Express. We show that peak electron densities during the SEP events are large enough to be detected in more than 30% of measurements, and, moreover, the reflections of the sounding signal from the ground almost entirely disappear. Nightside electron densities during SEP events are thus substantially increased as compared to normal nightside conditions. Key Points List of SEP events compiled using the Mars Express data Nightside ionosphere during these periods is extremely enhanced Ionization below 80 km, evidence for magnetic shadow effect ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893843870&doi=10.1002%2f2013GL058895&partnerID=40&md5=5db4ff85203aabff476107dccf83005a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7668
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Mathematics and Physics, Charles University in Prague, Prague, Czech Republic
Recommended Citation:
Němec F.,Morgan D.D.,Diéval C.,et al. Enhanced ionization of the Martian nightside ionosphere during solar energetic particle events[J]. Geophysical Research Letters,2014-01-01,41(3).