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Investigations of Atmospheric Waves in the Earth Lower Ionosphere by Means of the Method of the Creation of the Artificial Periodic Irregularities of the Ionospheric Plasma

1
Radiophysical Research Institute Nizhny Novgorod State University, Bolshaya Pechrskaya Str., 25/12a, 603950 Nizhny Novgorod, Russia
2
Nizhny Novgorod State University, 23 Prospekt Gagarina, 603950 Nizhny Novgorod, Russia
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(8), 450; https://doi.org/10.3390/atmos10080450
Received: 12 July 2019 / Revised: 29 July 2019 / Accepted: 3 August 2019 / Published: 6 August 2019
(This article belongs to the Special Issue Atmospheric Acoustic-Gravity Waves)
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Abstract

We present results of the studies of internal gravity waves based on altitude-time dependences of the temperature and the density of the neutral component and the velocity of the vertical plasma motion at altitudes of the lower ionosphere (60–130 km). The vertical plasma velocity, which in the specified altitude range is equal to the velocity of the neutral component, the temperature, and the density of the neutral atmosphere are determined by the method of the resonant scattering of radio waves by artificial periodic irregularities (APIs) of the ionosphere plasma. We have developed an API technique and now we are evolving it for studying the ionosphere and the neutral atmosphere using the Sura heating facility (56.1 N; 46.1 E), Nizhny Novgorod, Russia. An advantage of the API technique is the opportunity to determine the parameters of the undisturbed natural environment under a disturbance of the ionosphere by a field of powerful high frequency radio waves. Analysis of altitude-time variations of the neutral temperature, the density, and the vertical plasma velocity allows one to estimate periods of atmospheric waves propagation. Wavelike variations with a period from 5 min to 3 h and more are clearly determined. View Full-Text
Keywords: upper atmosphere; internal gravity waves; artificial periodic irregularities; ambipolar diffusion; temperature; density; plasma vertical velocity; sporadic E-layer; turbulence; turbopause level upper atmosphere; internal gravity waves; artificial periodic irregularities; ambipolar diffusion; temperature; density; plasma vertical velocity; sporadic E-layer; turbulence; turbopause level
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Bakhmetieva, N.V.; Grigoriev, G.I.; Tolmacheva, A.V.; Zhemyakov, I.N. Investigations of Atmospheric Waves in the Earth Lower Ionosphere by Means of the Method of the Creation of the Artificial Periodic Irregularities of the Ionospheric Plasma. Atmosphere 2019, 10, 450.

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