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

S. BLANCO; M. V. CANULLO; A. COSTA; O. A. ROSSO

REVISTA MEXICANA DE FíSICA

Sociedad Mexicana de Fisica

Año: 2000 vol. 46 p. 446 - 452

0035-001X

The Navier-Stokes, continuity and energy balance equation 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 waves (IGW) dispersion relation. The stable and unstable regions of this modes were derived as a function of two control parameters. The colatitude "theta" and the slow time evolution for tidal moded "tau". These regions were obatained for the different values of the magnetic field intensity, showing good agreement with the obsevational data for the South Atlantic anormality.