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Published by means of the yank Geophysical Union as a part of the Antarctic learn Series.
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Additional resources for Geomagnetism and Aeronomy: Studies in the Ionosphere, Geomagnetism and Atmospheric Radio Noise
Bjelland, O. Holt, and B. Landmark, Electron density and collision frequency observations in the lower D region during auroral absorption, in Electron Density Distribution in the Ionosphereand Exosphere,edited by E. Thrane, p. 22, North Holland Publishing Company, Amsterdam, 1964. Kane, J. , Re-evaluation of ionosphericelectron densities and collision frequencies derived from rocket measure- Copyright American Geophysical Union Antarctic Research Series Geomagnetism and Aeronomy: Studies in the Ionosphere, Geomagnetism and Atmospheric Radio Noise Vol.
5 and c, • 9 %. V. o-------• \ Fig. 25. Maps showing the location and boundaries of anomalies in the maximum of •oF2, summer, equinox, and winter. Copyright American Geophysical Union Vol. 4 43 Antarctic Research Series Geomagnetism and Aeronomy: Studies in the Ionosphere, Geomagnetism and Atmospheric Radio Noise 44 Vol. 5 and c•, = 6-7 % at the minimum. density profiles in the D region deduced from observations of ionospheric cross modulation, in Electron Density Profiles in the Ionosphere and Exosphere, edited by B.
Found by Duncan ;a UT variation of oppositephaseis found in the F• layer. Finally, the thickness of the F•. peak, which is related to the local temperature, does not show a UT variation but is larger in the summer (December) than in the winter. A parameter related to the maximum electron density in the F• layer also has a minimum in summer, indicating that the F• temperature is highest in summer. The presenceof ionization over the polar capsduring the long winter night is perhaps the most obvious evidence that conventional processesof electron production by sunlight, electron loss reactions, and diffusion are inadequate to explain the polar ionosphere.