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Response of the Equatorial Ionosphere to the Geomagnetic DP 2 Current SystemThe 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 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.
Document ID
20170002757
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Yizengaw, E.
(Boston Coll. Boston, MA, United States)
Moldwin, M. B.
(Michigan Univ. Ann Arbor, MI, United States)
Zesta, E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Magoun, M.
(Boston Coll. Boston, MA, United States)
Pradipta, R.
(Boston Coll. Boston, MA, United States)
Biouele, C. M.
(Universite de Yaounde I Yaounde, Cameroon)
Rabiu, A. B.
(National Space Research and Development Agency Abuja, Nigeria)
Obrou, O. K.
(Paris Univ. France)
Bamba, Z.
(Centre de Recherche Scientifique de Conakry Rogbanè Conakry, Guinea)
Paula, E. R. De
(Instituto Nacional de Pesquisas Espacias Sao Jose dos Campos, Brazil)
Date Acquired
March 31, 2017
Publication Date
July 25, 2016
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 43
Issue: 14
ISSN: 0094-8276
Subject Category
Space Sciences (General)
Report/Patent Number
GSFC-E-DAA-TN40911
Distribution Limits
Public
Copyright
Other

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