On the Impact of Eddy Motions in the Mesosphere and Lower Thermosphere on the Evolution of the Signal Scattered by Artificial Periodic Irregularities

The main objective of this study is experimental diagnostics of eddy ordered structures at the altitudes of the mesosphere and upper thermosphere, such as those that occur when internal gravity waves propagate in stratified flows in the atmospheric boundary layer. To this end, we consider the impact...

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Published inRadiophysics and quantum electronics Vol. 57; no. 5; pp. 360 - 371
Main Authors Bakhmet’eva, N. V., Grigor’ev, G. I., Lapin, V. G.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.10.2014
Springer
Springer Nature B.V
Subjects
Analysis
Astronomy
Astrophysics and Astroparticles
Atmosphere
Diagnostic systems
Earth
Eddies
Hadrons
Heavy Ions
Irregularities
Lasers
Mathematical and Computational Physics
Mesosphere
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Planetary boundary layer
Quantum Optics
Relaxation time
Scattering
Synchronism
Theoretical
Thermosphere
Turbulence
Wave propagation
Electron Number Density
Atmospheric Boundary Layer
Turbulent Velocity
Periodic Structure
Turbulent Motion
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Summary:The main objective of this study is experimental diagnostics of eddy ordered structures at the altitudes of the mesosphere and upper thermosphere, such as those that occur when internal gravity waves propagate in stratified flows in the atmospheric boundary layer. To this end, we consider the impact of eddy motions in the mesosphere and lower thermosphere during relaxation of the signal scattered by periodic irregularities. The irregularities are created by a standing wave when the ionosphere is heated by high-power HF radio waves. A model of a uniform eddy with sizes exceeding the scattering volume is used. A relation between the eddy period and the characteristic time of relaxation of scattered signal, for which the synchronism of the waves scattered by a periodic structure is broken, is found. This, in turn, decreases the amplitude of the scattered signal and its relaxation time. Experimental data on atmospheric turbulence obtained by the resonant scattering technique are presented.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-014-9519-4