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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 21, issue 4
Ann. Geophys., 21, 1031–1037, 2003
https://doi.org/10.5194/angeo-21-1031-2003
© Author(s) 2003. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 21, 1031–1037, 2003
https://doi.org/10.5194/angeo-21-1031-2003
© Author(s) 2003. This work is distributed under
the Creative Commons Attribution 3.0 License.

  30 Apr 2003

30 Apr 2003

Comparison of travelling ionospheric disturbance measurements with thermosphere/ionosphere model results

Ya. F. Ashkaliev1, G. I. Gordienko1, Ch. Jacobi2, Yu. G. Litvinov1, V. V. Vodyannikov1, and A. F. Yakovets1 Ya. F. Ashkaliev et al.
  • 1Institute of Ionosphere, Almaty, 480020, Kazakhstan
  • 2University of Leipzig, Institute for Meteorology, Stephanstr. 3, 04103 Leipzig, Germany

Abstract. Comparisons of modeled and measured responses of the ionosphere to the passage of atmospheric gravity waves are made for data recorded by an ionosonde located at Almaty (76°55' E, 43°15' N) from June 2000 until May 2001. Temporal variations of the altitude (hmF) and electron content (NmF) of the F-layer peak are used for comparisons. A significant part of the observations showed well-defined wave structures on the hmF, NmF and other parameter variations observed throughout the entire nights. Both the modeling study and measurements showed that, as the F-layer is lifted by the positive surge in gravity wave, the electron content at the F-layer peak decreases, with the slab thickness being increased as well. Subsequently, the opposite happens as hmF falls below its equilibrium value. Some discrepancy between the model and experimental results related to the phase difference between hmF and NmF variations is revealed.

Key words. Ionosphere (ionosphere-atmosphere interaction, ionospheric disturbances)

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