DOI: 10.1002/2016GL069283
论文题名: High temporal resolution observations of auroral electron density using superthermal electron enhancement of Langmuir waves
作者: Vierinen J. ; Bhatt A. ; Hirsch M.A. ; Strømme A. ; Semeter J.L. ; Zhang S.-R. ; Erickson P.J.
刊名: Geophysical Research Letters
ISSN: 0094-9705
EISSN: 1944-9436
出版年: 2016
卷: 43, 期: 12 起始页码: 5979
结束页码: 5987
语种: 英语
英文关键词: auroral precipitation
; enhanced plasma line
; incoherent scatter radar
Scopus关键词: Carrier concentration
; Electron density measurement
; Magnetosphere
; Radar
; Electron acceleration
; Electron density profiles
; Electron precipitation
; High temporal resolution
; Incoherent scatter radar
; Measurement techniques
; Plasma lines
; Superthermal electrons
; Electrons
; atmospheric wave
; aurora
; electron density
; flux measurement
; ionization
; ionosphere
; magnetosphere
; plasma
; precipitation (climatology)
; radar
; scattering
英文摘要: We report high temporal resolution auroral electron precipitation observations using the Sondrestrom incoherent scatter radar. The observations make use of the superthermal electron enhancement of Langmuir waves, which is shown to give accurate observations of the electron density during auroral ionization at a subsecond temporal resolution. This is important when matching to the time scales of auroral precipitation-related phenomena, such as energy input into the atmosphere and magnetospheric electron acceleration mechanisms. We describe the measurement technique and show an example observation of auroral precipitation. The results show transients in electron density in the order of a few seconds, which are fully resolved by the plasma line measurements. An electron precipitation model is used to estimate precipitation energy and flux density. The energetic electron flux during the example event has variations even at short time scales. The results show that electron density profiles derived from plasma lines can be a powerful new observational capability. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977592944&doi=10.1002%2f2016GL069283&partnerID=40&md5=4045c6c3ba4b0b24d4b284806d4b161b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10668
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: Haystack Observatory, Massachusetts Institute of Technology, Westford, MA, United States
Recommended Citation:
Vierinen J.,Bhatt A.,Hirsch M.A.,et al. High temporal resolution observations of auroral electron density using superthermal electron enhancement of Langmuir waves[J]. Geophysical Research Letters,2016-01-01,43(12).