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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
Open AccessArticle

Method for Determining Neutral Wind Velocity Vectors Using Measurements of Internal Gravity Wave Group and Phase Velocities

Institute of Solar-Terrestrial Physics, Lermontov st., 126A, P.O. Box 291, Irkutsk 664033, Russia
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Atmosphere 2019, 10(9), 546; https://doi.org/10.3390/atmos10090546
Received: 12 July 2019 / Revised: 5 September 2019 / Accepted: 11 September 2019 / Published: 13 September 2019
(This article belongs to the Special Issue Atmospheric Acoustic-Gravity Waves)
This study presents a new method for determining a neutral wind velocity vector. The basis of the method is measurement of the group velocities of internal gravity waves. Using the case of the Boussinesq dispersion relation, we demonstrated the ability to measure a neutral wind velocity vector using the group velocity and wave vector data. An algorithm for obtaining the group velocity vector from the wave vector spectrum is proposed. The new method was tested by comparing the obtained winter wind pattern with wind data from other sources. Testing the new method showed that it is in quantitative agreement with the Fabry–Pérot interferometer wind measurements for zonal and vertical wind velocities. The differences in meridional wind velocities are also discussed here. Of particular interest were the results related to the measurement of vertical wind velocities. We demonstrated that two independent methods gave the presence of vertical wind velocities with amplitude of ~20 m/s. Estimation of vertical wind contribution to plasma drift velocity indicated the importance of vertical wind measurements and the need to take them into account in physical and empirical models of the ionosphere and thermosphere. View Full-Text
Keywords: internal gravity waves; phase and group velocities; neutral wind; vertical wind; vertical drift of the ionospheric plasma internal gravity waves; phase and group velocities; neutral wind; vertical wind; vertical drift of the ionospheric plasma
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Medvedev, A.V.; Ratovsky, K.G.; Tolstikov, M.V.; Vasilyev, R.V.; Artamonov, M.F. Method for Determining Neutral Wind Velocity Vectors Using Measurements of Internal Gravity Wave Group and Phase Velocities. Atmosphere 2019, 10, 546.

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