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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2000
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0035001X_v46_n5_p446_Blanco http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0035001X_v46_n5_p446_Blanco_oai |
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I28-R145-paper_0035001X_v46_n5_p446_Blanco_oai2020-10-19 Blanco, S. Canullo, M.V. Costa, A. Rosso, O.A. 2000 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. application/pdf http://hdl.handle.net/20.500.12110/paper_0035001X_v46_n5_p446_Blanco info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Mex. Fis. 2000;46(5):446-452 Gravity modes Ionospheric F-region Magnetic effects Tidal wind Excitation of gravity modes in the parameter space of the tidal wind system (II): Magnetic effects info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0035001X_v46_n5_p446_Blanco_oai |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-145 |
| collection |
Repositorio Digital de la Universidad de Buenos Aires (UBA) |
| 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 http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0035001X_v46_n5_p446_Blanco_oai |
| work_keys_str_mv |
AT blancos excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects AT canullomv excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects AT costaa excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects AT rossooa excitationofgravitymodesintheparameterspaceofthetidalwindsystemiimagneticeffects |
| _version_ |
1766026629311627264 |