Physics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8..377k&link_type=abstract
Geophysical Research Letters, vol. 8, Apr. 1981, p. 377-380.
Physics
88
Equatorial Atmosphere, F Region, Ionospheric Disturbances, Plasma Drift, Radio Interferometers, Space Plasmas, Drift Rate, Electric Fields, Plasma Diagnostics, Radar Echoes
Scientific paper
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. 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.
Farley Donald T.
Fejer Bela G.
Ierkic Mario H.
Kudeki Erhan
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