globalchange  > 科学计划与规划
DOI: 10.1002/2015GL065257
论文题名:
Altitude dependence of nightside Martian suprathermal electron depletions as revealed by MAVEN observations
作者: Steckiewicz M.; Mazelle C.; Garnier P.; André N.; Penou E.; Beth A.; Sauvaud J.-A.; Toublanc D.; Mitchell D.L.; McFadden J.P.; Luhmann J.G.; Lillis R.J.; Connerney J.E.P.; Espley J.R.; Andersson L.; Halekas J.S.; Larson D.E.; Jakosky B.M.
刊名: Geophysical Research Letters
ISSN: 0094-8449
EISSN: 1944-8180
出版年: 2015
卷: 42, 期:21
起始页码: 8877
结束页码: 8884
语种: 英语
英文关键词: Mars ; MAVEN mission ; nightside suprathermal electron depletions
Scopus关键词: Carbon dioxide ; Ionosphere ; Ionospheric measurement ; Orbits ; Population statistics ; Electron population ; Magnetic sources ; Mars ; Martian ionosphere ; Martian surface ; MAVEN mission ; Suprathermal electrons ; Volatile evolution ; Electrons ; absorption ; altitude ; carbon dioxide ; crustal structure ; electron density ; instrumentation ; ionosphere ; magnetic field ; Mars ; Martian atmosphere ; spacecraft ; spatiotemporal analysis ; statistical analysis
英文摘要: The MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft is providing new detailed observations of the Martian ionosphere thanks to its unique orbital coverage and instrument suite. During most periapsis passages on the nightside ionosphere suprathermal electron depletions were detected. A simple criterion was implemented to identify the 1742 depletions observed from 16 November 2014 to 28 February 2015. A statistical analysis reveals that the main ion and electron populations within the depletions are surprisingly constant in time and altitude. Absorption by CO2 is the main loss process for suprathermal electrons, and electrons that strongly peaked around 6 eV are resulting from this interaction. The observation of depletions appears however highly dependent on altitude. Depletions are mainly located above strong crustal magnetic sources above 170 km, whereas the depletions observed for the first time below 170 km are globally scattered onto the Martian surface with no particular dependence on crustal fields. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84954476047&doi=10.1002%2f2015GL065257&partnerID=40&md5=6f2f6a6678010fa1ad40ae65c78f59e6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8065
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: Université de Toulouse, UPS-OMP, IRAP, Toulouse, France

Recommended Citation:
Steckiewicz M.,Mazelle C.,Garnier P.,et al. Altitude dependence of nightside Martian suprathermal electron depletions as revealed by MAVEN observations[J]. Geophysical Research Letters,2015-01-01,42(21).
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