DOI: 10.1002/2015GL066170
论文题名: Mars heavy ion precipitating flux as measured by Mars Atmosphere and Volatile EvolutioN
作者: Leblanc F. ; Modolo R. ; Curry S. ; Luhmann J. ; Lillis R. ; Chaufray J.Y. ; Hara T. ; McFadden J. ; Halekas J. ; Eparvier F. ; Larson D. ; Connerney J. ; Jakosky B.
刊名: Geophysical Research Letters
ISSN: 0094-8529
EISSN: 1944-8260
出版年: 2015
卷: 42, 期: 21 起始页码: 9135
结束页码: 9141
语种: 英语
英文关键词: atmosphere
; escape
; Mars
; pickup ion
; sputtering
Scopus关键词: Earth atmosphere
; Sputtering
; Upper atmosphere
; Dipole magnetic fields
; Escape
; Extreme conditions
; Gyroradius
; Mars
; Mars atmosphere
; Space plasmas
; Volatile evolution
; Heavy ions
; atmospheric wave
; diameter
; ion exchange
; magnetic field
; Martian atmosphere
; plasma
; polarization
; precipitation (climatology)
; solar wind
; temporal analysis
英文摘要: In the absence of an intrinsic dipole magnetic field, Mars' O+ planetary ions are accelerated by the solar wind. Because of their large gyroradius, a population of these planetary ions can precipitate back into Mars' upper atmosphere with enough energy to eject neutrals into space via collision. This process, referred to as sputtering, may have been a dominant atmospheric loss process during earlier stages of our Sun. Yet until now, a limited number of observations have been possible; Analyzer of Space Plasmas and Energetic Atoms-3/Mars Express observed such a precipitation only during extreme conditions, suggesting that sputtering might be not as intense as theoretically predicted. Here we describe one example of precipitation of heavy ions during quiet solar conditions. Between November 2014 and April 2015, the average precipitating flux is significant and in agreement with predictions. From these measured precipitating fluxes, we estimate that a maximum of 1.0 × 1024 O/s could have been lost due to sputtering. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955202112&doi=10.1002%2f2015GL066170&partnerID=40&md5=e430cd613d60421c183e64c30052cb37
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8145
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: LATMOS/CNRS Université Pierre et Marie Curie, Paris, France
Recommended Citation:
Leblanc F.,Modolo R.,Curry S.,et al. Mars heavy ion precipitating flux as measured by Mars Atmosphere and Volatile EvolutioN[J]. Geophysical Research Letters,2015-01-01,42(21).