Interferometer studies of equatorial F region irregularities and drifts

E. Kudeki, B. G. Fejer, D. T. Farley, H. M. Ierkic

Research output: Contribution to journalArticle

Abstract

A radar interferometer technique developed at Jicamarca, Peru and first used to study electrojet irregularities has now been used successfully to study plasma turbulence in the equatorial F region. Our first results have shown that the most ‘turbulent’ echoes appear to come from a region that extends for tens of kilometers in altitude but for only a kilometer or less in the east‐west direction. This slab may very well be the wall of a depleted region, a plasma ‘bubble’. Sometimes the irregularities can be tracked as they move eastward or westward. Velocity profiles for the evening period obtained in this way show a strong shear, with westward velocities at the lowest altitudes observed and eastward velocities above. A plausible explanation for this shear is that the westward drifts are driven by electric fields produced by westward E region winds and mapped up along magnetic field lines, while at higher heights, where the electron density is greater, the drifts are controlled by the F region dynamo driven by eastward winds.

Original languageEnglish (US)
Pages (from-to)377-380
Number of pages4
JournalGeophysical Research Letters
Volume8
Issue number4
DOIs
StatePublished - Apr 1981
Externally publishedYes

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F region
interferometer
irregularities
interferometers
plasma bubbles
shear
electrojets
plasma
Peru
plasma turbulence
evening
E region
electrojet
low altitude
velocity profile
electron density
radar
bubble
electric field
slab

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Interferometer studies of equatorial F region irregularities and drifts. / Kudeki, E.; Fejer, B. G.; Farley, D. T.; Ierkic, H. M.

In: Geophysical Research Letters, Vol. 8, No. 4, 04.1981, p. 377-380.

Research output: Contribution to journalArticle

Kudeki, E. ; Fejer, B. G. ; Farley, D. T. ; Ierkic, H. M. / Interferometer studies of equatorial F region irregularities and drifts. In: Geophysical Research Letters. 1981 ; Vol. 8, No. 4. pp. 377-380.
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