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F-region electron heating by X-mode radiowaves in underdense conditions
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.
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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. Bibtex EndNote Reference Manager
