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Ann. Geophys., 19, 11-15, 2001
www.ann-geophys.net/19/11/2001/
© European Geosciences Union 2001
Observation of isotropic electron temperature in the turbulent E region
S. Saito, S. C. Buchert, S. Nozawa, and R. Fujii
Solar-Terrestrial Environment Laboratory, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464–8601, Japan
Correspondence to: S. Saito (susaito@stelab.nagoya-u.ac.jp)
Abstract. Using EISCAT radar data,
we find that electrons are strongly heated in the magnetic field-line direction
during high electric field events. The remote site data show that the electron
temperature increases in almost the same way in the field-perpendicular
direction; electron heating by E region plasma turbulence is isotropic. We
discuss the implications of our observation for the "plasmon"-electron
as well as the wave Joule heating models of the anomalous electron heating in
the E region.
Key words. Ionosphere (auroral ionosphere; plasma
temperature and density; plasma waves and instabilities)
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