Journal cover Journal topic
Annales Geophysicae Sun, Earth, planets, and planetary systems An interactive open-access journal of the European Geosciences Union
Ann. Geophys., 27, 2585-2592, 2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
26 Jun 2009
F-region electron heating by X-mode radiowaves in underdense conditions
H. Löfås1,2, N. Ivchenko2, B. Gustavsson3, T. B. Leyser4, and M. T. Rietveld5 1Uppsala University, Uppsala, Sweden
2Space and Plasma Physics, School of Electrical Engineering, KTH, Stockholm, Sweden
3Univ Tromsø, Dept Phys & Technol, 9037 Tromsø, Norway
4Swedish Institute of Space Physics, Uppsala, Sweden
5EISCAT, 9027 Ramfjordbotn, Norway
Abstract. Observations of modifications of the electron temperature in the F-region produced by powerful high frequency radiowaves at 4.04 MHz transmitted in X-mode are presented. The experiments were performed during quiet nighttime conditions with low ionospheric densities so no reflections occurred. Electron temperature enhancements of the order of 300–400 K were obtained. Numerical simulation of ohmic heating by the pump wave reproduces both altitude profiles and temporal dependence of the temperature modifications in the experiments.

Citation: Löfås, H., Ivchenko, N., Gustavsson, B., Leyser, T. B., and Rietveld, M. T.: F-region electron heating by X-mode radiowaves in underdense conditions, Ann. Geophys., 27, 2585-2592,, 2009.
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