DOI: 10.1002/2016GL070090
论文题名: Response of the equatorial ionosphere to the geomagnetic DP 2 current system
作者: Yizengaw E. ; Moldwin M.B. ; Zesta E. ; Magoun M. ; Pradipta R. ; Biouele C.M. ; Rabiu A.B. ; Obrou O.K. ; Bamba Z. ; de Paula E.R.
刊名: Geophysical Research Letters
ISSN: 0094-8874
EISSN: 1944-8605
出版年: 2016
卷: 43, 期: 14 起始页码: 7364
结束页码: 7372
语种: 英语
英文关键词: DP 2 current
; equatorial electrodynamics
Scopus关键词: Atmospheric electricity
; Electric fields
; Electrodynamics
; Geomagnetism
; Ionosphere
; Magnetosphere
; Density distributions
; Drift velocities
; Equatorial electrojet
; Equatorial ionosphere
; Equatorial regions
; High Latitudes
; Interplanetary magnetic fields
; Radar observations
; Ionospheric measurement
; convection
; current
; density
; electric field
; electrodynamics
; electrojet
; equatorial dynamics
; geomagnetic field
; ionosphere
; latitude
; magnetic field
; magnetometer
; magnetosphere
; solar wind
英文摘要: The response of equatorial ionosphere to the magnetospheric origin DP 2 current system fluctuations is examined using ground-based multiinstrument observations. The interaction between the solar wind and magnetosphere generates a convection electric field that can penetrate to the ionosphere and cause the DP 2 current system. The quasiperiodic DP 2 current system, which fluctuates coherently with fluctuations of the interplanetary magnetic field (IMF) Bz, penetrates nearly instantaneously to the dayside equatorial region at all longitudes and modulates the electrodynamics that governs the equatorial density distributions. In this paper, using magnetometers at high and equatorial latitudes, we demonstrate that the quasiperiodic DP 2 current system penetrates to the equator and causes the dayside equatorial electrojet (EEJ) and the independently measured ionospheric drift velocity to fluctuate coherently with the high-latitude DP 2 current as well as with the IMF Bz component. At the same time, radar observations show that the ionospheric density layers move up and down, causing the density to fluctuate up and down coherently with the EEJ and IMF Bz. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979520535&doi=10.1002%2f2016GL070090&partnerID=40&md5=63f1e726fccd48fc4c0cb4302b193541
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9837
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: Institute for Scientific Research, Boston College, Boston, MA, United States
Recommended Citation:
Yizengaw E.,Moldwin M.B.,Zesta E.,et al. Response of the equatorial ionosphere to the geomagnetic DP 2 current system[J]. Geophysical Research Letters,2016-01-01,43(14).