Articles | Volume 19, issue 1
Ann. Geophys., 19, 11–15, 2001
https://doi.org/10.5194/angeo-19-11-2001
Ann. Geophys., 19, 11–15, 2001
https://doi.org/10.5194/angeo-19-11-2001

  31 Jan 2001

31 Jan 2001

Observation of isotropic electron temperature in the turbulent E region

S. Saito, S. C. Buchert, S. Nozawa, and R. Fujii S. Saito et al.
  • 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)