Accession Number : AD0620243

Title :   A POSSIBLE EXPLANATION OF THE APPLETON ANOMALY OF THE F2 LAYER-II: A MODEL WITH UNEQUAL HORIZONTAL VELOCITIES.

Descriptive Note : Scientific rept.,

Corporate Author : SHEFFIELD UNIV (ENGLAND) DEPT OF APPLIED MATHEMATICS

Personal Author(s) : Windle,D. W. ; Kendall,P. C.

Report Date : 1965

Pagination or Media Count : 14

Abstract : The effects of an assumption that the neutral air in the F2 layer is set in horizontal motion by the ionization are examined. It is assumed that the horizontal velocity of the neutral air is a fixed proportion of the horizontal velocity of the ionization. The model F2 layer discussed is in equilibrium at noon and there is no electrodynamic drift. The earth's magnetic field is assumed to be that of a geocentric dipole whose axis coincides with the earth's axis of rotation. The sun's radiation is assumed to be symmetrically incident on the earth. It is found that the theoretical enhancement of the equatorial trough in N sub m, discovered when the horizontal velocities are the same is only present to a marked degree when the horizontal velocities differ by 2.5% or less. However, although moderate induced horizontal winds may have little effect on the shape of the equatorial trough, they do affect the overall magnitude of N and N sub m by a factor which may be as large as three. (Author)

Descriptors :   (*IONOSPHERE, ATMOSPHERE MODELS), GEOMAGNETISM, PLASMAS(PHYSICS), ELECTRON DENSITY, GAS FLOW, AIR, IONIZATION, DIFFUSION

Distribution Statement : APPROVED FOR PUBLIC RELEASE