A dayside ionospheric positive storm phase driven by neutral winds

G. Lu, L. P. Goncharenko, A. D. Richmond, R. G. Roble, N. Aponte

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

This paper presents observations and numerical simulations of ionospheric and thermospheric disturbances associated with a moderate geomagnetic storm on 10 September 2005. During the event, the incoherent radars located in Millstone Hill and Arecibo observed a dayside positive storm phase as manifested by the enhanced electron density in the F region. The universal time (UT)-altitude profile of electron density measured by both radars displayed a structure that closely resembles the Greek letter A. A similar structure is also reproduced by the Thermosphere-Ionosphere Electrodynamics General Circulation Model (TIEGCM). This peculiar electron density distribution is found to be associated with vertical ion drift, which initially was upward and then became downward. Using realistic time-dependent ionospheric convection and auroral precipitation as inputs, the TIEGCM reveals that the primary cause of the positive storm response was the enhanced meridional neutral wind rather than the penetration magnetospheric electric field. This study reiterates the importance of neutral wind effects on ionospheric disturbance.

Original languageEnglish
Article numberA08304
JournalJournal of Geophysical Research: Space Physics
Volume113
Issue number8
DOIs
Publication statusPublished - Aug 1 2008

Fingerprint

electron density
ionospherics
ionospheric disturbances
General Circulation Models
electrodynamics
Ionosphere
Electrodynamics
thermosphere
electrons
ionospheres
Carrier concentration
general circulation model
ionosphere
wind effects
F region
universal time
Wind effects
disturbance
Electronic density of states
geomagnetic storm

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Lu, G., Goncharenko, L. P., Richmond, A. D., Roble, R. G., & Aponte, N. (2008). A dayside ionospheric positive storm phase driven by neutral winds. Journal of Geophysical Research: Space Physics, 113(8), [A08304]. https://doi.org/10.1029/2007JA012895

A dayside ionospheric positive storm phase driven by neutral winds. / Lu, G.; Goncharenko, L. P.; Richmond, A. D.; Roble, R. G.; Aponte, N.

In: Journal of Geophysical Research: Space Physics, Vol. 113, No. 8, A08304, 01.08.2008.

Research output: Contribution to journalArticle

Lu, G. ; Goncharenko, L. P. ; Richmond, A. D. ; Roble, R. G. ; Aponte, N. / A dayside ionospheric positive storm phase driven by neutral winds. In: Journal of Geophysical Research: Space Physics. 2008 ; Vol. 113, No. 8.
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