DOI: 10.1002/2016GL068686
论文题名: A case study of a density structure over a vertical magnetic field region in the Martian ionosphere
作者: Duru F. ; Gurnett D.A. ; Diéval C. ; Morgan D.D. ; Pisa D. ; Lundin R.
刊名: Geophysical Research Letters
ISSN: 0094-9584
EISSN: 1944-9315
出版年: 2016
卷: 43, 期: 10 起始页码: 4665
结束页码: 4672
语种: 英语
英文关键词: ionosphere
; Mars
Scopus关键词: Ionosphere
; Ionospheric measurement
; Magnetic fields
; Magnetism
; Spacecraft
; Controlled structures
; Crustal magnetic fields
; Density enhancement
; Ionospheric electron densities
; Ionospheric plasmas
; Mars
; Mars Express spacecraft
; Vertical magnetic fields
; Magnetoplasma
; altitude
; aurora
; electron density
; heating
; ionosphere
; magnetic field
; Mars
; Martian atmosphere
; plasma
; solar wind
; spacecraft
英文摘要: One of the discoveries made by the radar sounder on the Mars Express spacecraft is the existence of magnetically controlled structures in the ionosphere of Mars, which result in bulges in the ionospheric electron density contours. These bulges lead in turn to oblique echoes, which show up as hyperbola-shaped features in the echograms. A hyperbola-shaped feature observed over an isolated region of strong crustal magnetic field is associated with a plasma cavity in the upper ionosphere and a corresponding density enhancement in the lower levels of the ionosphere. We suggest that along open magnetic field lines, the solar wind electrons are accelerated downward and the ionospheric ions are accelerated upward in a manner similar to the field line-driven auroral acceleration at Earth. This heating due to precipitating electrons may cause an increase in the scale height and may drive a loss of ionospheric plasma at high altitudes. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969931017&doi=10.1002%2f2016GL068686&partnerID=40&md5=f13e2fe7210abe5814fd22d13254d9b8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10547
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 Astronomy, University of Iowa, Iowa City, IA, United States
Recommended Citation:
Duru F.,Gurnett D.A.,Diéval C.,et al. A case study of a density structure over a vertical magnetic field region in the Martian ionosphere[J]. Geophysical Research Letters,2016-01-01,43(10).