Spatial and temporal variations of the ion velocity measured in the venus ionosphere

K. L. Miller, W. C. Knudsen

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The average velocity of the Venus ionosphere is nightward and approximately symmetric about the sun-Venus axis. We report here on temporal and spatial deviations from this average flow and their effects on the ionosphere. Temporal variability of the ion flux affects the main ionization source on the nightside. The influence of the solar wind is seen in the correlation between nightside ion density and ionopause height. Spatial asymmetries include a low-altitude superrotation (v-dawn < v-dusk) component related to superrotation of the neutral atmosphere, and a high-altitude prograde (v-dawn > v-dusk) component that is shown to be the result of asymmetric pressure gradients on the dayside.

Original languageEnglish
Pages (from-to)107-110
Number of pages4
JournalAdvances in Space Research
Volume7
Issue number12
DOIs
StatePublished - 1987

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