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DOI: 10.1002/2015GL065293
论文题名:
The spatial distribution of planetary ion fluxes near Mars observed by MAVEN
作者: Brain D.A.; McFadden J.P.; Halekas J.S.; Connerney J.E.P.; Bougher S.W.; Curry S.; Dong C.F.; Dong Y.; Eparvier F.; Fang X.; Fortier K.; Hara T.; Harada Y.; Jakosky B.M.; Lillis R.J.; Livi R.; Luhmann J.G.; Ma Y.; Modolo R.; Seki K.
刊名: Geophysical Research Letters
ISSN: 0094-8536
EISSN: 1944-8267
出版年: 2015
卷: 42, 期:21
起始页码: 9142
结束页码: 9148
语种: 英语
英文关键词: atmospheric escape ; solar wind interaction
Scopus关键词: Electric fields ; Solar wind ; Atmospheric escape ; Closed surfaces ; Mars atmosphere ; Northern Hemispheres ; Solar wind interactions ; Solar-wind convection ; Spherical shell ; Volatile evolution ; Ions ; atmospheric convection ; electric field ; flux measurement ; ion exchange ; Mars ; Northern Hemisphere ; solar wind ; spatial distribution ; sphere
英文摘要: We present the results of an initial effort to statistically map the fluxes of planetary ions on a closed surface around Mars. Choosing a spherical shell ~1000 km above the planet, we map both outgoing and incoming ion fluxes (with energies >25 eV) over a 4 month period. The results show net escape of planetary ions behind Mars and strong fluxes of escaping ions from the northern hemisphere with respect to the solar wind convection electric field. Planetary ions also travel toward the planet, and return fluxes are particularly strong in the southern electric field hemisphere. We obtain a lower bound estimate for planetary ion escape of ~3 × 1024 s-1, accounting for the ~10% of ions that return toward the planet and assuming that the ~70% of the surface covered so far is representative of the regions not yet visited by Mars Atmosphere and Volatile EvolutioN (MAVEN). © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955207353&doi=10.1002%2f2015GL065293&partnerID=40&md5=8bf1711069028363d362b442ab2b63ce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8152
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: Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States

Recommended Citation:
Brain D.A.,McFadden J.P.,Halekas J.S.,et al. The spatial distribution of planetary ion fluxes near Mars observed by MAVEN[J]. Geophysical Research Letters,2015-01-01,42(21).
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