DOI: 10.1002/2015GL063452
论文题名: Limited impact of escaping photoelectrons on the terrestrial polar wind flux in the polar cap
作者: Kitamura N. ; Seki K. ; Nishimura Y. ; McFadden J.P.
刊名: Geophysical Research Letters
ISSN: 0094-9400
EISSN: 1944-9131
出版年: 2015
卷: 42, 期: 9 起始页码: 3106
结束页码: 3113
语种: 英语
英文关键词: field-aligned potential drop
; ion outflow
; photoelectron
; planetary atmospheric loss
; polar cap
; polar wind
Scopus关键词: Atmospheric ionization
; Drops
; Earth atmosphere
; Ionosphere
; Photoelectrons
; Photons
; Solar energy
; Earth-like exoplanets
; Ion outflow
; Polar cap
; Polar wind
; Potential drop
; Production rates
; Terrestrial planets
; Top-side ionosphere
; Ions
; outflow
; polar meteorology
; solar activity
; statistical analysis
; terrestrial environment
; wind field
英文摘要: A statistical analysis using a long-term (over one solar cycle) photoelectron data set obtained by the Fast Auroral SnapshoT satellite demonstrates that photoelectron outflows has little impact on the polar wind ion flux. This result implies that it is the source region of H+ ions in the topside ionosphere and not the photoelectron flux that controls the terrestrial polar wind flux. The polar wind ion flux, estimated from electron outflow does not change with increasing net photoelectron production due to increasing solar activity. The magnitude of a self-created field-aligned potential drop is likely determined so as to equilibrate electron fluxes with ion fluxes regulated by a net production rate of H+ ions. The result suggests that the polar wind H+ ion flux from magnetized terrestrial planets, including Earth-like exoplanets, can be estimated once the composition and temperature of its atmosphere, which determine the net ion production rate, are known. Key Points The polar wind ion flux does not change with increasing solar activity The magnitude of the field-aligned potential drop is larger at solar maximum The polar wind ion flux is likely regulated by a net production rate of H+ ions ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930472280&doi=10.1002%2f2015GL063452&partnerID=40&md5=36288695466238e7cb0e1d078aa44e82
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9015
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: Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
Recommended Citation:
Kitamura N.,Seki K.,Nishimura Y.,et al. Limited impact of escaping photoelectrons on the terrestrial polar wind flux in the polar cap[J]. Geophysical Research Letters,2015-01-01,42(9).