Electrodynamics of the formation of ionospheric wave number 4 longitudinal structure

H. Jin, Yasunobu Miyoshi, H. Fujiwara, H. Shinagawa

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

The global wave number 4 longitudinal structure of ionospheric density has been observed recently by a number of satellite measurements and considered as a signature of dynamical coupling from the deep atmosphere to the ionosphere. By using a numerical model of atmospheric electrodynamics with input fields from a whole atmosphere general circulation model and an ionosphere-thermosphere model, we investigated the generation mechanism for the longitudinal structure of the F-region zonal electric field (vertical E × B drift) as a possible driver of the ionospheric density variation, especially with respect to the eastward zonal wave number 3 diurnal tide (DE3) that originates from the convective activities in the troposphere and propagates upward. The simulation showed that the longitudinal profile of zonal perturbation electric field is largely influenced by the zonal DE3 wind around the height of peak Hall conductivity during the daytime, and that it is by the zonal DE3 wind in the F-region during the nighttime. The daytime zonal electric field is a direct result from charge separation induced by the Hall dynamo current, whereas the nighttime zonal electric field is rather produced to satisfy the electrostatic condition.

Original languageEnglish
Article numberA09307
JournalJournal of Geophysical Research: Space Physics
Volume113
Issue number9
DOIs
Publication statusPublished - Sep 1 2008

Fingerprint

electrodynamics
Electrodynamics
electric field
ionospherics
Electric fields
F region
electric fields
Ionosphere
daytime
zonal wind
ionospheres
ionosphere
atmospheres
General Circulation Models
Troposphere
atmosphere
thermosphere
Tides
polarization (charge separation)
tides

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

Electrodynamics of the formation of ionospheric wave number 4 longitudinal structure. / Jin, H.; Miyoshi, Yasunobu; Fujiwara, H.; Shinagawa, H.

In: Journal of Geophysical Research: Space Physics, Vol. 113, No. 9, A09307, 01.09.2008.

Research output: Contribution to journalArticle

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