Response of the nighttime midlatitude ionosphere to the passage of an atmospheric gravity wave

A. F. Yakovets, V. V. Vodyannikov, G. I. Gordienko, Ya. F. Ashkaliev, Yu. G. Litvinov, S. B. Akasov

2008

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DOI 10.1134/s0016793208040129
Data confidence 70 medium
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Abstract

Using the data of the ionospheric vertical sounding in Almaty, the response of various parameters of the nighttime F layer to the passage of an atmospheric gravity wave, generated during the large magnetic storm on July 24–25, 2004, is studied. The analysis of the phase relations between the variations in the electron density at the F layer maximum (NmF), the layer maximum height (hmF), and the layer half-thickness showed that they are determined by the slope of the wave phase front. It is shown that the half-thickness of the layer changes in anti-phase with the variations in NmF2. The known fact that the amplitudes of variations in the critical frequencies of the F 2 layer are smaller than the amplitudes of electron density variations at fixed heights is explained.