On the Isotropic Hydromagnetic Waves in the Exosphere

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Journal of Geomagnetism and Geoelectricity (Tokyo)

DOI:https://doi.org/10.5636/jgg.14.49· OSTI ID:4782644

OKUZAWA, Takashi

The propagation of weak hydromagnetic waves in the exosphere between l x 10³ and 5 x 10⁴ km height levels from the Earth's surface is studied, using simplified models. In the upper atmosphere, the steady magnetic field is a dipole one, and it is, in general, difficult to discuss the wave propagation in such a field. But, in some special regions, an approximate treatment can be permitted. An attempt is made to describe two-dimensional wave fronts in the regions near the geomagnetic equatorial plane and high above the geomagnetic pole, using an approximate height-variation of the Alfven wave velocity, and it is found that: (1) For the isotropic wave, the shape of wave fronts is the same for both the equatorial and the polar regions. (2) In the upper region above V_a (Alfven wave velocity) maximum height level, the incident waves with large pitch angle to the zenith are almost reflected, but in the region below V_a maximum height level, the incident waves with any pitch angle have tendency to propagate almost Earthward. Equations for the drift velocity and rate of heating of each component of an ohmically heated multicomponent plasma are derived using the Fokker-Planck equation. The results are applied to a plasma containing two types of positive ion.

• Research Organization: Kyoto Univ.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-002378
• OSTI ID: 4782644
• Journal Information: Journal of Geomagnetism and Geoelectricity (Tokyo), Journal Name: Journal of Geomagnetism and Geoelectricity (Tokyo) Journal Issue: 1 Vol. 14; ISSN 0022-1392
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ATMOSPHERE
CHEMICAL REACTIONS
CHLORIDES
CONFIGURATION
DIPOLES
EARTH
GEOPHYSICS
HOMOGENEOUS REACTORS
HYDROGEN PEROXIDES
HYDROMAGNETIC WAVES
IMPURITIES
IONOSPHERE
LEVELS
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MANGANESE ALLOYS
MOTION
PERCHLORIC ACID
QUALITATIVE ANALYSIS
REFLECTION
SEPARATION PROCESSES
SHOCK WAVES
URANIUM ALLOYS
VELOCITY
ZONES