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

The main result of this work is the estimation of the entropy mode accompanying a wave disturbance, observed at the atmosphere heights range of 90–120 km. The study is the direct continuation and development of recent results on diagnosis of the acoustic wave with the separation on direction of prop...

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Bibliographic Details
Published in:Atmosphere 2021-09, Vol.12 (9), p.1123
Main Authors: Leble, Sergey, Vereshchagin, Sergey, Bakhmetieva, Nataliya V., Grigoriev, Gennadiy I.
Format: Article
Language:English
Subjects:
Acoustic propagation
acoustic wave
Acoustic wave propagation
Acoustic waves
Algorithms
Altitude
artificial periodic irregularities
Atmosphere
diagnostics
Ecosystem disturbance
Eigenvectors
Energy
Entropy
exponential atmosphere
Ionosphere
Ionospheric plasma
Lower mantle
Lower thermosphere
Mathematical analysis
Measurement
Mesosphere
neutral temperature
Operators (mathematics)
Parameters
Perturbation
Physics
Plasma
projection operators
Radio wave scattering
Radio waves
Separation
Thermosphere
Vertical velocities
Wave propagation
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Summary:The main result of this work is the estimation of the entropy mode accompanying a wave disturbance, observed at the atmosphere heights range of 90–120 km. 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 was carried out on the SURA heating facility. The mathematical foundation of the mode separation algorithm is based on the dynamic projection operators technique. The operators are constructed via the eigenvectors of the coordinate evolution operator of the transformed system of balance equations of the hydro-thermodynamics.
ISSN:2073-4433
2073-4433
DOI:10.3390/atmos12091123