Articles | Volume 23, issue 3
Ann. Geophys., 23, 827–830, 2005
https://doi.org/10.5194/angeo-23-827-2005
Ann. Geophys., 23, 827–830, 2005
https://doi.org/10.5194/angeo-23-827-2005

  30 Mar 2005

30 Mar 2005

The ionospheric heating beneath the magnetospheric cleft revisited

G. W. Prölss G. W. Prölss
  • Institut für Astrophysik und Extraterrestrische Forschung, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany

Abstract. A prominent peak in the electron temperature of the topside ionosphere is observed beneath the magnetospheric cleft. The present study uses DE-2 data obtained in the Northern Winter Hemisphere to investigate this phenomenon. First, the dependence of the location and magnitude of the temperature peak on the magnetic activity is determined. Next, using a superposed epoch analysis, the mean latitudinal profile of the temperature enhancement is derived. The results of the present study are compared primarily with those obtained by Titheridge (1976), but also with more recent observations and theoretical predictions.