Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects

The Navier-Stokes, continuity and energy balance equations including magnetic effects for an inviscid compressible fluid in the ionospheric F-region were perturbed around the tidal phenomenological solution. We imposed adiabaticity and incompressibility to the perturbation. Our results satisfy the i...

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Autores principales: Blanco, S., Canullo, M.V., Costa, A., Rosso, O.A.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2000
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0035001X_v46_n5_p446_Blanco
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spelling paperaa:paper_0035001X_v46_n5_p446_Blanco2023-06-12T16:45:34Z Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects Rev. Mex. Fis. 2000;46(5):446-452 Blanco, S. Canullo, M.V. Costa, A. Rosso, O.A. Gravity modes Ionospheric F-region Magnetic effects Tidal wind The Navier-Stokes, continuity and energy balance equations including magnetic effects for an inviscid compressible fluid in the ionospheric F-region were perturbed around the tidal phenomenological solution. We imposed adiabaticity and incompressibility to the perturbation. Our results satisfy the internal gravity wave (IGW) dispersion relation. The stable and unstable regions of these modes were derived as a function of two control parameters, the colatitude θ and the slow time evolution for tidal modes τ. These regions were obtained for different values of the magnetic field intensity, showing good agreement with observational data for the South Atlantic anomaly. Our model predictions for other magnetic field intensities corresponding to other latitude dependences need to be contrasted with new observational data. In addition we show for some hours and latitudes that, resonant interaction occurs between low frequency tidal waves and two high frequency gravity waves. In these regions, where tidal modes are linearly unstable, the gravity group velocity is modulated by a function of the tidal phase velocity. Fil:Blanco, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Canullo, M.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0035001X_v46_n5_p446_Blanco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Gravity modes
Ionospheric F-region
Magnetic effects
Tidal wind
spellingShingle Gravity modes
Ionospheric F-region
Magnetic effects
Tidal wind
Blanco, S.
Canullo, M.V.
Costa, A.
Rosso, O.A.
Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects
topic_facet Gravity modes
Ionospheric F-region
Magnetic effects
Tidal wind
description The Navier-Stokes, continuity and energy balance equations including magnetic effects for an inviscid compressible fluid in the ionospheric F-region were perturbed around the tidal phenomenological solution. We imposed adiabaticity and incompressibility to the perturbation. Our results satisfy the internal gravity wave (IGW) dispersion relation. The stable and unstable regions of these modes were derived as a function of two control parameters, the colatitude θ and the slow time evolution for tidal modes τ. These regions were obtained for different values of the magnetic field intensity, showing good agreement with observational data for the South Atlantic anomaly. Our model predictions for other magnetic field intensities corresponding to other latitude dependences need to be contrasted with new observational data. In addition we show for some hours and latitudes that, resonant interaction occurs between low frequency tidal waves and two high frequency gravity waves. In these regions, where tidal modes are linearly unstable, the gravity group velocity is modulated by a function of the tidal phase velocity.
format Artículo
Artículo
publishedVersion
author Blanco, S.
Canullo, M.V.
Costa, A.
Rosso, O.A.
author_facet Blanco, S.
Canullo, M.V.
Costa, A.
Rosso, O.A.
author_sort Blanco, S.
title Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects
title_short Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects
title_full Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects
title_fullStr Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects
title_full_unstemmed Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects
title_sort excitation of gravity modes in the parameter space of the tidal wind system (ii): magnetic effects
publishDate 2000
url http://hdl.handle.net/20.500.12110/paper_0035001X_v46_n5_p446_Blanco
work_keys_str_mv AT blancos excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects
AT canullomv excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects
AT costaa excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects
AT rossooa excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects
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