Tests of electrodynamic consistency from daytime ionospheric drift observations

Details Tests of electrodynamic consistency from daytime ionospheric drift observations Tests of electrodynamic consistency from daytime ionospheric drift observations

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.2413s&link_type=abstract

Journal of Geophysical Research, vol. 82, June 1, 1977, p. 2413-2418.

Computer Science

Sound

3

Daytime, E Region, F Region, Incoherent Scattering, Ionospheric Drift, Radar Measurement, Dynamo Theory, Geomagnetism, Ionospheric Sounding, Magnetic Disturbances, Midlatitude Atmosphere, Radar Scattering, Thermosphere

Scientific paper

The average electrodynamic consistency of daytime horizontal drifts in the E and F regions measured by incoherent scatter radar at Millstone Hill (Evans, 1972) with the tidal winds in the lower thermosphere at mid-latitudes derived from radar observations and tidal theory (Salah et al., 1975) is examined. E region average winds derived from observed ion drifts are shown to be consistent with measurements made using other techniques and confirm the tidal structure of the lower atmosphere deduced from ion temperature observations. The observed winds and electric fields are used to derive the dynamo current flowing locally in the E region and the magnetic perturbations produced at the ground; results are in good agreement with height averaged tidal winds in the lower thermosphere corresponding primarily to the (2,4) propagating mode. The magnetic fluctuations at the surface are in reasonable agreement with average mid-latitude solar quiet variation. These results support the suggestion that observed electric fields are of dynamo origin.

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