globalchange  > 气候减缓与适应
DOI: 10.1002/2014GL061679
论文题名:
First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT
作者: Kosch M.J.; Vickers H.; Ogawa Y.; Senior A.; Blagoveshchenskaya N.
刊名: Geophysical Research Letters
ISSN: 0094-9646
EISSN: 1944-9377
出版年: 2014
卷: 41, 期:21
起始页码: 7427
结束页码: 7435
语种: 英语
英文关键词: electric field ; ionosphere
Scopus关键词: Acoustic waves ; Acoustics ; Electric fields ; Electron resonance ; Electrons ; F region ; Ion acoustic waves ; Ionosphere ; Ionospheric measurement ; Ions ; Radar ; Anomalous resistivity ; Ground-based techniques ; High frequency HF ; High-energy electron ; Incoherent scatter radar ; Magnetic field line ; Suprathermal electrons ; Top-side ionosphere ; Electron temperature ; amplitude ; electric field ; estimation method ; instrumentation ; plasma ; pressure field ; pump ; radio wave ; wave reflection ; Europe
英文摘要: We have developed an active ground-based technique to estimate the steady state field-aligned anomalous electric field (E∗) in the topside ionosphere, up to ~600 km, using the European Incoherent Scatter (EISCAT) ionospheric modification facility and UHF incoherent scatter radar. When pumping the ionosphere with high-power high-frequency radio waves, the F region electron temperature is significantly raised, increasing the plasma pressure gradient in the topside ionosphere, resulting in ion upflow along the magnetic field line. We estimate E∗ using a modified ion momentum equation and the Mass Spectrometer Incoherent Scatter model. From an experiment on 23 October 2013, E∗ points downward with an average amplitude of ~1.6 μV/m, becoming weaker at higher altitudes. The mechanism for anomalous resistivity is thought to be low-frequency ion acoustic waves generated by the pump-induced flux of suprathermal electrons. These high-energy electrons are produced near the pump wave reflection altitude by plasma resonance and also result in observed artificially induced optical emissions. Key Points New ground-based techniquePump-induced suprathermal electrons cause anomalous resistivityAnomalous electric field hinders ion outflow ©2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912098688&doi=10.1002%2f2014GL061679&partnerID=40&md5=541e0363b7fba30b396f37c8bf17d2c7
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被引频次[WOS]:9   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6910
Appears in Collections:气候减缓与适应

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作者单位: National Institute of Polar Research, Tokyo, Japan

Recommended Citation:
Kosch M.J.,Vickers H.,Ogawa Y.,et al. First observation of the anomalous electric field in the topside ionosphere by ionospheric modification over EISCAT[J]. Geophysical Research Letters,2014-01-01,41(21).
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