Electric fields, Joule and particle heating in the high latitude thermosphere

Details Electric fields, Joule and particle heating in the high latitude thermosphere Electric fields, Joule and particle heating in the high latitude thermosphere

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38..887b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 38, Aug. 1976, p. 887-895.

Physics

1

Atmospheric Electricity, Auroras, Ionospheric Heating, Polar Regions, Thermosphere, Electric Fields, Magnetospheric Instability, Ohmic Dissipation, Particle Motion, Resistance Heating, Sporadic E Layer

Scientific paper

The author points out some difficulties involved in interpreting the motion of ionospheric irregularities and auroral forms in terms of magnetospheric convection. One main source of error in such interpretations is the existence of local small-scale electric fields in the lower ionosphere. Incoherent scatter radar is, however, able to derive average ion drift values, with localized effects removed, that can be related to magnetospheric convective motion. The Joule heating mechanism in the thermosphere is examined, and an example of Joule heating derived from ionospheric measurements is discussed. It is seen that the Joule heating rate may at times be greater than the solar EUV radiation. Preliminary studies of heating due to precipitating particles indicate that this source is comparable to Joule heating.

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