Working Paper Article Version 1 This version is not peer-reviewed

Study of a Gas Disturbance Mode Content Based on the Measurement of Atmospheric Parameters at the Heights of the Mesosphere and Lower Thermosphere

Version 1 : Received: 23 July 2021 / Approved: 26 July 2021 / Online: 26 July 2021 (18:04:42 CEST)

A peer-reviewed article of this Preprint also exists.

Leble, S.; Vereshchagin, S.; Bakhmetieva, N.V.; Grigoriev, G.I. Study of a Gas Disturbance Mode Content Based on the Measurement of Atmospheric Parameters at the Heights of the Mesosphere and Lower Thermosphere. Atmosphere 2021, 12, 1123. Leble, S.; Vereshchagin, S.; Bakhmetieva, N.V.; Grigoriev, G.I. Study of a Gas Disturbance Mode Content Based on the Measurement of Atmospheric Parameters at the Heights of the Mesosphere and Lower Thermosphere. Atmosphere 2021, 12, 1123.

Journal reference: Atmosphere 2021, 12, 1123
DOI: 10.3390/atmos12091123

Abstract

The main result of this work is the estimation of the entropy mode accompanying a wave disturbance, observed at the atmosphere heights range of 90-120km. The study is the direct continuation and development of recent results on diagnosis of the acoustic wave with the separation on direction of propagation. The estimation of the entropy mode contribution relies upon the measurements of the three dynamic variables (the temperature, density and vertical velocity perturbations) of the neutral atmosphere measured by the method of the resonant scattering of radio waves on the artificial periodic irregularities of the ionospheric plasma. The measurement of the atmosphere dynamic parameters has been carried out on the SURA heating facility. The mathematical foundation of the mode separation algorithm is based on the dynamic projecting operator technique. The operators are constructed via the eigenvectors of the coordinate evolution operator of the transformed system of balance equations of the hydro-thermodynamics.

Keywords

exponential atmosphere; acoustic wave; diagnostics; projection operators; artificial periodic irregularities; neutral temperature; density

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