A POSSIBLE EXPLANATION OF THE APPLETON ANOMALY OF THE F2 LAYER-II: A MODEL WITH UNEQUAL HORIZONTAL VELOCITIES.
SHEFFIELD UNIV (ENGLAND) DEPT OF APPLIED MATHEMATICS
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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 earths magnetic field is assumed to be that of a geocentric dipole whose axis coincides with the earths axis of rotation. The suns 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